> twitter community

This is where the disconnect is coming from. Twitter 'communities' are a tiny minority of persons. They do not represent the everyday person. This is particularly so with autism, as autism frequently entails social difficulties that get people ostracized from the communities they attempt to join. Twitter, in particular, is quick to ostracize, and you should therefore consider that "Autism Twitter" contains only the subset of autistic persons who can socially pass as conversant, and who choose to be vocal on social networks.