Yup, I've never met someone with an ASC who used 'language' normally (and by language I mean the whole range - words, tone of voice, content of sentences, linking that content to what others are saying in useful and appropriate ways, reading body language, their tone of voice, their eye contact, using appropriate body language themselves, etc etc. We just can't do it. We might get some of it right for X amount of time, but to the amazing minds of NT people it mostly comes across as clumsy, rude, boring, obsessive or all four things at once, and leads to us getting less and less of the things we need.
The range on the spectrum means you can have anything from no speech at all right up to incredible use-of-words-but-in-nearly-all-the-wrong-ways. It's always a communication disability though.
Jobs, friendships, relationships, help, housing...the social skills required to 'buy into' those things are so often beyond almost everyone on the autism spectrum unless there's help and training and understanding.
For example, X, has a degree in science and in theory could be anywhere in the world earning a small fortune in his very specialised area of it. He has Asperger syndrome. Intead, he's unemployed, has no friends, no partner, lives in hellish accommodation where his stress levels are through the roof, gets no help or support, can't do even the simplest of everyday things without getting himself into a total state. A specialist could easily write "high functioning - excellent use of language". But what does that mean for X and his life outcomes? Not a thing. Just a life filled with loneliness and fear and poverty because he has speech and a high IQ, therefore needs nothing, according to the services on offer.