Wisdom is not gained by knowing what is right. Wisdom is gained by practicing what is right, and noticing what happens when that practice succeeds and when it fails.
And, the sets that they built are just so beautiful. It's like going to a completely foreign country and experiencing a new culture that you've never seen before, especially at Camelot. It's just so magical. Personally, it's just so much more interesting than wearing jeans and a t-shirt, and walking around somebody else's house.