It's relatively simple why 3betting here is by far the best
option preflop.
Villain has shown (given
stats) that he has
loose tendencies. This generally doesn't mean just
loose in raising, but also calling raises. So when we 3bet he is going to be calling a fairly large
range of hands that we are still
ahead of. And given that he will have
position postflop, this should widen the
range he will
call with even more. Therefore, since a 3bet from us will be called by a large % of hands that we are
ahead of, then this is an easy 3bet for value (
ofc {acronym Renton hates} Very Happy).
I do however see your logic for only calling preflop. You suspect his raising here is very wide, and that a
raise from you will
fold out a very large portion of his
range. And while that might be true, a 3bet from us is going to be +ev now, and is still going to
lead to alot of +ev spots postflop when he overvalues the weak hands he called the 3bet with.
These assumptions of
villain should
lead to some adjustments that our
hero should make (if the assumptions hold true). Since he is calling a wide
range, our 3bet bluffing
range here should become more narrow, as we will be building a pot OOP against a
villain who doesn't like a to
fold. But we can now 3bet a wider
range for value (because he still calls worse).
"IF"
villain is a
nit here, who is opening a decent
range, but only continuing to your 3bet with a relatively narrow
range, and just doesn't put in alot of money postflop without a very good hand (say he only calls 3bets here with
QQ+, AK, and slows down with
QQ if he doesnt hit a
set).
Well then I could see just calling here with your
KK some % of the time. However, that is likely a relatively rare situation. But if it was the
case, then you would obv increase your 3bet bluffing frequency to
exploit his folding to 3bet tendencies.