This is all a massive distraction.
In a humane, just society, parents of autistic children would get support no matter what caused the autism. But the US is not a humane, just society; it is a viciously capitalist society, so parents have only the chance of “compensation”. And they can only get that if they can prove that the autism was caused by some entity that has enough money to pay them.
Consequently lobby groups develop, and some people, maybe mistaken but possibly unscrupulous, amplify or even exploit the distress and poverty of parents to become figureheads and ‘heroes’, and sometimes to gain an income for themselves.
The fundamental evil is capitalism, which sets everyone in competition with everyone else.