Yes most autistic people shouldn't suffer if we dismantle the oppressive societal constructs and stigma around the condition and treat them as human.

Most people shouldn't suffer if we break down the social constructs and stigma around them, from race, gender and sex, class, and many other factors.

Antinatalism is not about selectively culling autistic people. It is about the realization that society sucks and the societal constructs we have are likely to increase suffering and so we shouldn't have kids anymore until those issues are resolved.

I am gay, and a racial minority, and an antinatalist. I would hate to have a child knowing they would likely have to face racial discrimination just as much as I do not find it moral to have a child because they may be gay, or autistic, or gender nonconforming, or poor. All those things would likely increase their suffering.

But I wouldn't mind adopting any of those kids, even an autistic child, because live people are people and deserve love and compassion. Antinatalism is about the non-alive children that don't exist and the stance that they shouldn’t ever come to be, no matter what they end up being because in our current world, live likely won't be easy, they would likely contribute to the global environment crisis, and will likely increase the suffering in the world. And also they cannot consent to being forced into existence.