I was asking a legitimate question. How much editing did they do when they used to print color chrome film compared to BW negative film?
Slides can be used to make separation negatives directly for offset printing. The colour can be adjusted through filtration. Masking can be done as well.
Slides can also be copied to negative and enlarged, employing dodging and burning and masking or whatever.
Slides can be copied to negative b&w and treated the same as any b&w negative.
Lots of ways to deal with slides.