Arthur itis,
I understand your daughter's frustration and wish to get on with her life. I work with some people who are functional autistics. They hold jobs critical to the success of my company. They are different but have managed to mix in with others. Others have come to accept their "peculiarities" and respect their talents. Keep in mind that this is a company where "different" is a qualification for being hired.
My niece will never survive alone in a "normal" setting. SHe is severely autistic and her parents are setting up a Trust Fund to be sure she is safe when they are gone.
Again there are many levels of autism.