The premise of your argument assumes that objectivity in art exists
The exact opposite in fact. This doesn't change the fact that it's possible to discuss and reach common ground on what's literally visible in the image. We could then move on to interpretation and finally normative evaluation. Along the way, we'll encounter differences in what we see, how we interpret it and we think of it. These differences tend to give rise to interesting questions and sometimes insights/realizations about other people's as well as your own views. It's quite enlightening. It's also an approach that results in differences in subjective seeing evolving into gained insights for all involved, instead of friction.
Let's try again.
Looking at the first photograph, I see a series of partially destroyed walls. I see a hole in the closest wall through which I can see the rest of the scene, with further walls apparently running away from the viewer or parallel to the first wall. It's difficult to tell the structure of the (ex-)building depicted. There is debris on the ground. Several kids are in the center of the image, framed by the broken wall in the foreground, some of whose faces are visible. The kids whose faces are visible appear to be smiling. One kid in the foreground has two clutches. Another kid right behind him has a hand stretched out to him. The kid with the klutches has a facial expression that's difficult to determine; he might be smiling, or he might be grimacing for some reason.
My interpretation of the scene is that kids are playing in the ruins of a building or perhaps village, with the ruins seeming to be originated by war violence. As to the nature of their play, I find it hard to guess what's going on, in particular with regard to the kid in the foreground. Did he select to be the focal point of what seems to be a chasing game? Does he enjoy it? Is he really handicapped, or are the clutches part of play? One kid in the back is laughing; is he laughing
at his mates (?) in the foreground or
with them? Etc.
In terms of norms, let's say what I'm looking for in a photograph might be summed up as a graphically, aesthetically pleasing or at least (to me) interesting scene, and (if there's opportunity for it) some kind of message, commentary or aid to reflect on an aspect of society. I'm also looking for something that makes me see things
differently than I did before; either literally (seeing) or in an abstract sense 'seeing' things in a different light. So you might say an innovative (subjectively, within my standards and frame of reference) approach.
In terms of evaluation, so applying my personal norms to what I think I see, I find the very central composition effective and well-executed, but not necessarily very novel (not even for 1935) or exciting. It's a bit like looking at a stage in a theater, with a curtain, a stage and a backdrop - it's rather 2-dimensional. It's graphically effective, but not necessarily very exciting. In terms of the message, I think I'm looking at kids playing, and whether or not their play is mutually empowering or exploitative in how the kids relate to each other, it looks for all intents and purposes like kids being kids. And this in the middle of what must be a war scene (I assume), which makes for an obvious contrast - a contrast that is perhaps a little
too obvious, although it's certainly effective in grabbing someone's attention (pressing a gun in someone's face is also effective, but it's also not very subtle or elegant). So my judgement at this moment would be that it's a well-executed, aesthetically pleasing photo - but not one that engages me in particular.
I could do the other photo in the same way, but it'd take some time to get to the same point. Trying to cut some corners: there's kids in this frame who literally (physically) interact with the frame they're positioned in, and they're spread around more. Faces are shown, but no very apparent smiles; I'd describe (interpretation) these looks as possibly neutral, maybe inquisitive, curious or attentive to something the photographer is doing or saying. Several kids are looking directly at the photographer, which I find engaging and makes me realize they really
interact with the photographer - some of them are also physically closer. There's an interesting (normative evaluation) divide between the group in the foreground and the group in the background, although the kid top left ties the group in the back together with the viewer/photographer again. I find it much more difficult to figure out what exactly is going on here and what the action(s) is/are that we're in the midst of. In terms of composition and geometry, the central logic is a classic pyramid with one kid (I'm incluned to think of him as 'the jester') breaking this core logic with his less formal and more dynamic pose. The receding lines of the alley (?) and the broken wall in the background (creating a mirrored echo with the upper edge of the hole in the foreground wall) create a sense of depth, which is emphasized by the positioning of the kids. Overall (normative assessment) I find this image a whole lot more interesting; it leads me to ask many more questions and leaves me to guess at the answers a lot more, and given the more static pose of many of the characters, I find them easier to relate to as an adult - and given the fact that they're looking at me, I can't help but wonder what they think, how they feel about their environment and how they reflect on the guy with the camera apparently finding them relevant enough to photograph.
So I come to a very different conclusion than you do - but it's IMO not so relevant that our conclusions are different. What's relevant to me, is that I try to make explicit the thought process that leads to this conclusion, in which indeed, every step of the way is imbued with considerable subjectivity. But by making each step in the process explicit, we could potentially discuss the different assumptions, norms and expectations that we apparently have. Not only does this make our exchange more meaningful than a blunt "this photo is good and that one is bad" - it also puts the both of us in a position to recognize better what's going on in our own minds, as well as making it easier to see things in a different light.
You strike me as a smart fellow, so I'm sure you can do this, one way or another. If only you take from this that you can actually draw a line between observing and passing normative judgement (however fuzzy that line may be), I've achieved all I could ask for. Give it a try. I guarantee you - it'd be a small step for me, but a giant leap for yourself.