The reason that Protect isn't banned is because it has moments where it doesn't work.
Wha people fail to realize is that the rules arent there because some people are always losing, it is because without them, the game is less about strategy & more about dumb luck. For instance, if there were no uber clause, everyone would have em. They are so strong, the only way to compete is to use other ubers. OHKO? If thats not unfaif dumb luck, what is?