I find stereotypes so concerning as they prevent autistic people being accepted and understood leading to mistreatment like bullying, verbal or physical, with some even both verbally and physically.
On another autistic community there's autistic people or people pretending to be autistic promoting the stereotypes. People like parents who want to come to an understanding of Autism are likely to believe autistic people making them believe the stereotypes are true.
One of the most common concerns I see parents have is their children being bullied because of their autism. From what I've seen some people even try to fit the stereotypes once diagnosed with autism, so some have gone from wanting to communicate and interact with others to being introverted because there's the stereotype autistic people are introverted.
I can safely assume the rejection because of the stereotypes makes autistic children, and even some adults start feeling hopeless, worthless thinking they have no place in this world, I find it so concerning for thwarted belonging leads to suicidal thoughts.