[soultwist]

If you have the 55K, you need to get the queens out. Say you make TT55K, you were able to catch-up on the aces but if the Q's makes QQ77 you lose. Hen you have 5KK, then you make your 2 pair KKxx you don't care about the Q's or if they make their 2 pair. In a normal situation you would want to get heads up here, yes. But because we suspect that our K's can't win without the improvement it changes things.

Also, Raising to knock the Q's out is a play that won't work on a lot of the lower level players.