Why do people have such large trailers?

Seems that we have a "small" TT for our needs according to some here. We have 8 children so 10 of us in a 30ft (box) Jayco. I can't keep them inside for any period of time. But when we do, it doesn't seem any different than when we live at home. We are a really close family. Home is a 3 bedroom house where all the girls sleep in one room, the boys in the other. Brought them up "old school". There is no "my space" only "our space" and they agree. Never heard any complaints of not having room. This closeness is what also makes for pleasant long drives across country. They entertain themselves without the need for electronics (except for the Kindles when they want to read).

We do enjoy seeing all the other models out there and would probably upgrade to a larger, but we like no payments since we own everything. Now, where to camp next....