Many countries restrict taking photographs of strangers even on public streets. Privacy is the argument for such laws. In the US, street photography is considered constitutionally protected speech and allowed unless the photos are used commercially. How do photographers here feel about the different approaches?
Your question is slightly loaded in asking how photographers feel. Should it not be as to how we feel as people?
My view (and one which is covered by law here) is that my image is a key part of my personal data and cannot be used by anyone else with my express permission.
It has to be borne in mind that no rights are absolute before discussion of them. There will always be fudges when they are in competion with other rights, or can lead to compromising public safety etc.
It really isn't a big deal. I take my camera on the streets. So long as I am open about it (the new mirrorless lenses being huge helps that), people will avoid me or not. If someone asked me to delete photos I would oblige. Occasionally, if I saw someone particularly worthy of a photo, I will speak first. Sometimes, no words, but a simple gesture is enough. A nod from them, perhaps. I will always agree to forward an image if requested.
It's a cultural thing, but also a self-defensive thing which is rooted in culture, but has more modern underpinning. If you have been involved peripherally in a case of identity theft, then you will appreciate what can happen with uncontrolled reproduction of your image.
You mentioned in another post that once you're in public you are fair game, but that ignores the amount of personal data that can be gleaned from your appearance, and your movements, and your behaviour.
It's something which is handled with a light touch by the authorities, though.