>>10334
Because, for the most part, children can't protect themselves. It's incredibly easy to force them to do things, to hurt them, to take things away from them, and to deny them things like agency and respect. They cannot retaliate against somebody older than them because of the difference in physical strength and size. It's roughly the same reasoning as old school people who insist hitting women is wrong and that women need to be taken care of and protected.
As for why it applies to every kid instead of just the nice ones, just because a child is acting like a shithead doesnt mean they don't deserve love and care. If a child is having a meltdown, acting out, or some other third thing then chances are there is a reason behind it that they don't know how to articulate.
I'm a pedo, I believe children should be treated with respect, love, and in general like human beings. That doesn't mean I'm going to pretend like I (an adult) can handle things and articulate my feelings and thoughts in ways a child can't. They don't have enough experience in life to voice, for example, why it makes them upset that the teacher dismissed them. They don't know how to put into words that they feel like they aren't being loved. It's not that they don't have emotions and feelings and complex ideas and things, it's putting those things into language; They just don't have the necessary skills to voice it the way an adult does.
Every child deserves the chance to build that experience.