ffs get it in and move onto the next hand. Decisions with Kk for 100bbs preflop are trivial i.e you dont fold.
When you get to 200bbs deep then their is a discussion to have. Also, so much math in this thread for a 'OMG fold KK preflop HH'
Im pretty sure you're ability to move up and beat the game is pretty much not effected by whether you can fold KK to AA preflop enough. At worst KK vs AA is 'meh' and at best a trivial get it in choice