I definitely understand some of the points made by antinatalism. I often struggle with the fact that life is imposed on me rather then chosen and i am definitely considering geopolitics and ecological/economic when i make choices of how many kids i should have, but i long rationalized most issues to be with human society and not with life itself.
I very much believe society can still evolve but to do so we will need to become better people first, the most straightforward way to get better people is to educate them well starting from birth.
The conclusion of antinatalism seems to be a pessimistic extreme, that life itself can only be suffering so we are better of self-extincting ourself by stopping to make new babies but if all progressives followed this rhetoric then the only people
Reproducing are those that do not care at all.
In other words in order for their valid criticisms to have any positive effect on society they should still support progressives that are able to provide to have some amount of kids because or else they become a Selffulfilling prophecy of societal decline.
The bias against neurodivergents having children is sadly enough way more common than just those circles, but people like Greta Thunberg are proof that if anything the world needs more Autism and a not cure.
I share your feelings there regarding the choice or lack thereof with being born and seeing some of the points of antinatalism.
I don't think that community fully understands what antinatalism should be. Casually browsing it though, it seems more like they're more going towards eugenics than an actual antinatalist approach - i.e. applied to everyone, nondiscriminately, for reasons of morality (choice vs forced into existence, overpopulation and its ties to resource allocation and requirements and such). Arguably some posts there could be reasonably expected from non-antinatalist people, the sort of 'if you can't afford to raise them, don't have them'.
I take great joy in providing my son a life free of the home life experiences that made my youth hell. It still remains to be seen how well he'll avoid the pitfalls of social interaction I suffered through, but I do feel like I'm preparing him far better than I ever was.
I don't think five years olds think about the philosophy of antinatalism at all. Its a very interesting philosophy due to the fact that it is about people who don't already exist. Its certainly not a shitty idea, rather one very thought provoking.