The concept of "curing" autism is a nonsensical one because autism, by definition, is an innate neurobiological disorder which is genetically determined. Teaching an individual with autism to adapt to the mainstream world and function more successfully in it is not called "cure", it is called improving adjustment. "Autism Speaks" and CAN know this damn well. All the research they support is geared towards finding and eliminating the genes that cause autism, not towards finding better ways of helping autistic people to lead more fulfilling lives. I don't remember the exact figures now, but the vast majority of the money they receive goes into genetic research, and only a meager sum has been spent on entertainment for autistic people and something of that sort. Practically none of it has gone into funding new therapies, teaching methods or some other support for existing autistic children and adults.
In other words - they not only couldn't care less about how autistic people live or feel, they don't want them to be around at all.
It is, quite simply, easier. Rather than have to offer support, it is far more convenient to make sure there are no people who need it in the first place. Services are expensive and are a drain on the state's budget; teaching requires a lot of time and effort; compassion and understanding are much too emotionally taxing on certain individuals (who would have wallow in self-pity and tell everybody how their children ruined their lives and haven't lived up to their expectations). As Stalin said once, "there's a person, there's a problem; no person, no problem".