This putting adjective before noun bit autistic child/child with autism, is a classic example of pc being daft.
In normal grammatical English we put the adjective before the noun 'The tall man',' the blonde woman', 'the busy child'. If we were French the general rule would be the opposite. Different countries have different rules.
Once you start getting your knickers in a twist over the ordinary use of language, far from making these various groups feel more normal by putting the person first, we make them look odd because we are changing the normal rules of grammar especially from them, so it istantly draws attention to their condition.
This post is written by a short-sighted dyspraxic woman.