Yeah but how many are calling. Anything less than Kx is definitely a bluff catcher and Kx for most part is a bluff catcher since hero is not going to valuebet a weak king there for most part? So what hands hero expects to get a call from? I certainly do strongly support the mentality to value bet always when you think you have the best hand, even when you u know that villain calling raise is extra small, just as to hide your own hand. But as it can be seen, here we are deep and are up against a decent thinking opponent, that is again a good hand reader and seems capable of bluff CR. I kinda hate getting myself into a guessing spot where I'm stuck to a guessing game(It does happen a lot in HU) but here i don't have a definite range nor exact history or read on villain(hero does but we reading the HH dont). It all depends on how often villain would bluff CR. His range here is mostly 77,55 or KQ and possibly KJ and bluffs obv. Due to the fact that there are only few hands that would bluff CR(missed draws) villain must have had either turned a hand into a bluff or have a hand. From theory point of view we would have to approximate his bluffing freq. so that we can tell for certain that folding(0 EV) is not worse than calling and being often behind. Since villain range here is polarized between only better hands than ours and total bluffs the bluff component becomes really important.