Well, the way you were phrasing it made it sound like you were saying that the teams won because of pocket passer QBs. If you just want to say "pocket passers win championships" without any reason as to why, you could also say that they lose championships because every season there are a bunch of pocket passer QBs who don't win the SB, or even make the playoffs. I'm not trying to be a douche or anything, I just think that if you're going to say that pocket passers win SB's, you should have some evidence/reasoning to back it up, don't just say it for the sake of saying it.
Also, there have been more than 2 scramblers who won the SB, off the top of my head I can think of Roger Staubach, Cowboys QB who won the 1971 and 1977 championships and was a big-time scrambler.