Our children are human beings and they have the right to experience the same as everybody else. So if they want to go to college, and the college is willing to accept them, let them at least have a go. If it works out, you may just give the world another John Forbes Nash Jr, and if it doesn't, at least you gave them the opportunity.
UK education system is different, daughter diagnosed at 15 and had to leave school. At 17, she tried a few adult classes to get the same qualifications as school, and managed to pass English, the others she didn't get the grade. The main problem was the exam stress, she just couldn't cope on the day. She then tried vocational college, a 2 year course with no exams, all assignment assessed, passed the course with flying colours and managed to get a job with the qualification, which she stuck at for about 3 years.
About a year ago she decided to apply for University, and was accepted. She started about 6 months ago but recently found it too hard, the stress of having to get assignments in by a specific date too much. So she's quit Uni.
She knows now what her limits are, and that's going to help her move forwards to whatever she wants to try next. She does get low, she does get frustrated, and sometimes her motivation vanishes. But we tell her over and over that sz doesn't close the door to having a good life and experiences. Yes, it makes the door harder to push open, but like everybody in life, you have to push the door to open it.