Depends on your frame of reference.
Adapting to society is generally the most practical one, as it focuses on tangible realities, like whether you can work/study or not. The less you can do, the more severe you are.
Some people need constant care, otherwise they'd constantly hurt themselves; some people need constant care because they can only manage walking from one place to another; some people can work/study and succeed in their field. All the things in-between these are possible in regards to "can" and "can't do".
What you look like is a poor one, even if those who're more severe do constant motor mannerisms on average.