The whole ethos of TT from the start, was to present archaeology in a more exciting way, hence the "3 day to find out" format.
I expect to be shot down on this by the more knowledgeable, but some of the TT digs do end up as broader examinations as far as I was aware.
Also, arent many of the senior archaeologists teachers/proffesors, so are limited in their time away from their jobs?.