UTG Opens 2.1 % . Now what ?

Ok.
say we know a villain only opens AA ,KK or AK UTG . The chances he has a pair are 0.9 % - AK 1.2% . So ,hes going to be opening More often with AK .
I can see this being useful info with his reaction to 3bets.
How else could this info be useful ?

We have good implied odds preflop assuming he has 100BB, setmine KK-22 and maybe stuff like T9s/98s/76s/65s and only 3bet AA.

Any reads on post flop tendencies? If you know he c bets when he has it c/f everything else you can print money if you are the only one in the hand.

Also, this guys is dream to have on your left. Steal blinds.

don't 3b him much

info is very useful, it's always useful to know someone's cards, 3-combo range preflop = gold

Ya, its nice to know he rarely, if ever, has these hands postflop when he doesnt raise as well.

Hero's range changes depending on how villain plays postflop.