Sounds like escapism! You can get all that IRL, except teaching people to fly Sorry for criticizing, your ideas are good, but what to do in a LD is a sore spot for me.
An idea popped to my mind after I re-read the comments. There is actually a theory of dreams, which sees dreams as IRL simulator. Since human lifestyle and existence is heavily depending on our social skills and teamwork, it is thought that dreams would be constant practicing for real life situations.

Makes some sense after all, but I don't know how much significance it has for our evolution and survival

ps. I do use LD sometimes for social training. For sheer interest