If there were actually a cure to Autism then I think your see it widely adopted. The backlash we've seen now is just because grifters have jumped on offering a bunch of pseudo science quackery to take advantage of distressed parents. It's similar to the gay conversion camps, modern medical science basically doesn't know what causes people to be gay so naturally it's impossible to fix it if you don't even understand the cause. Naturally that didn't stop opportunists from running torture camps that terrorized the kids and scared them straight, at least until they could leave home at 18.