Problem is that, although it's a very uncatholic concept; popes come and go... It's simply the reality.
The Catholic majority may not take kindly to a pope declaring something as controversial or far out as priest being able to have sex and marry, or homosexuality being recognized as a legitimate lifestyle in the eyes of god.
People like to think it couldn't and would never happen in the modern day but... Fanatical Catholics are probably a more dangerous religious faction than any other; and if they call crusade... I honestly can't begin to predict who will answer.
Again I was brought up as a Catholic, but I do agree in many aspects with protestants. I think that clergy should be able to participate in intercourse with a woman to whom they are married with, and that they are allowed to marry. There are many opinions and beliefs I hold that aren't particularly sound within the Vatican, yet are definitely more open to debate amongst Anglicans or Lutherans.