im sure that mistreatment is part of the issue
im also sure that autism does, at least often, come with real internal stressors that are not the result of their treatment by others, and that make dealing with external stressors more difficult
i dont take an issue with the added context of conscious or subconscious ableism (though i think its besides the point here, because cruel or not, its still something potential children will still have to deal with)
i think its important to remember that even if that wasnt a factor, autism will often still impact the quality of life of potential children