I don't know what BB was like in Australia, but perhaps it wasn't used as a stepping stone towards Z-list celebritydom* like it is here. Maybe he wanted to do it purely for the experience (which is how it should be) and to spend his summer abroad doing something completely different. I don't know why, but I feel Jj is a very genuine (if maybe overly frank) person and quite admire his views on things..
*new word for Happyland dictionary