Just had someone tell me that, me (an autistic person) giving advice to someone on how to make friends is like "taking advice on how to walk by a guy in a wheelchair".

It's fine. That definitely didn't hurt at all. I'm not at all affected by this.

(I also recognise the harmful and ignorant rhetoric aimed at people who use mobility aids)

I think this is the most hurtful thing that's been said to me about being Autistic in a very long time.