It's not used 'too broadly.' Autism is a disorder on a spectrum. Some people have mild autism, some people have moderate and some people have severe autism. These are technical terms.
Also calling people 'autistic' and later calling people with autism 'it' as in 'try to injure itself' is a really shitty way to talk about human beings. Check yourself.
Also calling people 'autistic' and later calling people with autism 'it' as in 'try to injure itself' is a really shitty way to talk about human beings. Check yourself.