Don't know how often you've engaged with anti-natalists online, but there's a large overlap between them and stupidpol/malthusians. To most anti-natalists I've had the misfortune of interacting with it is nothing more than a fetish.

I don't think the ethical calculus is inherently worthless, but it's not something I'd ever base my view of reality on. It contradicts too much with everything else I believe and I don't think the presumption of existence being inherently bad is necessarily a productive stance to have.

This is why I said it's fine for individuals to have this view, but any sort of implementation of anti-natalism by a state/ would be indistinguishable from malthusianism. I also don't think it's something that will ever take hold of the collective conscious because it's inherently defeatist and requires a complete and total lack of optimism. Which as we can see, even in the most brutally repressive hierarchy's doesn't happen.

So I guess I just don't see the point of it as a philosophy worth fighting for.