Please dont feel silly - it's NOT - it is a common question, and one that I asked myself when I first joined UU 3 yrs ago.
Keep ASKING and dont let anyone discourage your questions. Many folks here have walked this same path before you and are quite motivated to help and share their experience...
not to put too fine a point on it, and we all have a different opinion on various things - but I feel that the definition you have shared for UAS is unkind and does NOT match the motivation for MANY of those afflicted with this condition - I dont want to create conflict, but merely suggest that there is more to UAS than what has been described here.
Please keep your mind, and your OPTIONS open