This is a problem religion and science denial can cause
It's also a problem child abuse can cause, which I think is more at fault here. The "behaviors" some of these people describe are totally normal for neurotypical kids, too, but there's a tendency among certain horrible parents to pathologize anything a kid does that's annoying as some sort of neural disorder. There's no way to
cure kids asking lots of questions, getting up early on weekends, liking cake more than vegetables, not wanting to do their homework, crying when they're upset and so forth because that's not a disorder, and part of parenting is helping them learn how to deal with it. But that's not what really awful parents want to hear. They were raised to believe parenting is wonderful and defines their worth as people and all this other be-fruitful-and-multiply rot, so when it's not, they want a drug they can insert into their child to make it so. Thus the plague of kids being "cured of ADHD" until they behaved, and now we have a similar thing with autism.
Of course, if you teach a kid that "behaviors" lead to having a gallon of bleach forced into them, they will do what they can to avoid that, so in that sense the
torture treatment appears to work so long as you don't actually pay any attention to the child. The parents know that. Child abuse is just easier than parenting, and they care more about ease than their children.
I suspect that years from now, one of these kids is going to announce that the new miracle cure for dementia (defined by them as "being dependent on your children and old") is hourly bleach enemas, just to complete the cycle.