There is a nuanced argument to made against the cozy relationship between drug companies and government and the financial incentives to push vaccines. But that nuance get blown away when the claims are vaccines cause autism. There is no evidence to support that, but people use it to justify not vaccinating their children. The problem there is that it doesn’t just put those kids at risk, it puts everyone at risk because vaccines are only really effective when everyone is vaccinated.
At any rate, something is causing autism. My D-i-L works with autistic kids. There are some classed as autistic that simply have lousy parents and the kids have behaviour problems. But some of these kids are truly trapped inside themselves.