You've hit on some important things here, but the "escape stigma" part strikes me as important. It appears that the MAHA theme is going to re-stigmatize autism and other mental illness, with a side of making them moral failures. Like they were in the '60s and before. If we want to help in general, this is the wrong approach.

I'm not sure if that's the right frame.

RFK Jr's main target seems to be pharmaceutical companies and the medical establishment although they are playing on the feeling of parents for whom it seems a terrible fate to raise a child who, in the worst case, seems to barely recognize you and for whom you might be caring for until you die. RFK is certainly not saying that autists or their parents are moral failures.

There's another whole question of reinstitutionalization but that's a place the right won't got because deinstitutionalization serves their interests and the left won't because of ideology.

That is: if you believe in private schools over public schools you want public schools to bear 100% of the burden of educating the uneducatable, warehousing violent students who drive other students to private school or homeschooling. (Happened to me and happened to the grandchildren of the guy who cuts my hay)

If you believe that the public sphere should be starved for the benefit of an unequal private sphere, if you believe that people should take an Uber instead of taking the bus, if you believe it's better to order a private taxi for your burrito than to eat out, if you want to demonstrate to people that it's worthless to spend on the welfare state, you want a person with severe mental illness screaming on every street corner. And if leftists defend the right of that person to do that they are doing the job of the right, and unlike the Koch Network or the Heritage Foundation they're doing it for free.