My two cents, if Joe Robbie didn't place a football team in Miami someone else would have. Joe Robbie didn't build a stadium with his own funds out of the goodness of his heart. He built it, and made huge profits from it. It was an investment, a dang good one. If you think there was any deeper more noble reason to it, check out your ticket stub. The proof is in the name, Pro Player. That's the name of the stadium, whether your fond childhood memories allow you acknowledge that fact or not. And if you need further proof, wait till Wonder Bread buys the naming rights. :)
Miami Dolphins at Wonder Bread stadium
Miami Dolphins at Wonder Bread stadium