For those who don’t know: Antinatalism, or anti-natalism, is a philosophical position and social movement that assigns a negative value to birth. Antinatalists argue that people should abstain from procreation because it is morally bad (some also recognize the procreation of other sentient beings as morally bad). https://en.m.wikipedia.org/wiki/Antinatalism
If you’re against people having kids you’re against the continued existence of the species beyond the currently existing generations. If you’re against the continued existence of the species it’s hard to say you can have political commitments beyond human extinction.
While anti-natalist groups like the Voluntary Human Extinction Movement solely rely on voluntary means of extinguishing the species, meaning they will never do it, they still think that human extinction is the best thing.
This doesn’t mean you have to have kids. I don’t plan to ever have kids and can’t really imagine ever wanting to have kids. That’s completely different from a moral evaluation of people having kids in general, and the human species continuing in general.
There is definitely a need to unfuck people’s ideas around parenthood, like for a lot of people it’s a personal failing if you never become a parent, when in reality, life is definitely about more than procreation.