But autistic people are not doomed. They can learn to avoid problematic behavior. Pretty well.
As well as the rest of the population can learn about the difficulties autistic people can encounter in a mostly non-autistic setting and be more understanding / show some empathy.
Probably in the case of Stallman, he grew up in an era before better understanding of the condition and how to deal with it properly. I'd also assume from his general attitude that he wouldn't take too well to being told how to behave.
As well as the rest of the population can learn about the difficulties autistic people can encounter in a mostly non-autistic setting and be more understanding / show some empathy.
It's a long way though.