My son with autism is going to work (starting this summer) and eventually have his own apartment. He may need some outside help, but my goal (and I think most of our goals) is that our children leave the nest and work and be as independent as possible. And he wants these things too, but, even if he did not, he would have to do them.
Just living at home with us and not working at all or not making progress is not acceptable to us and, fortunately, not to him. Yes, he has many challenges, but we (his parents) can not live forever and he needs to help himself as much as he can with our love and support. But he has to go face the world (albeit with some assistance) and feel worthwhile.
I feel most of us do a good job with our kids, even with their challenges.