Why do you think a BTN caller can’t have J9s here?
Because of rake. If you call J9s there then its clear mistake on nl2, no way you can make it profitable against TAG opening from EP unless you have huge edge postflop. It looks pretty, but it doesnt play that well when opponent has all better suited broadways dominating your hand. According to GTOWizard against 2,5bb open on nl500 rake J9s is folding on button 80% of time. On nl50 rake GTOWizard is pure folding.
I do think players at 2nl overvalue TPTK and just don’t fold them quite a high% of the time
Lets look a bit different. If he is betting AK/AQ then on river he will usually fire third time or at least check/call so you have 3 streets of value. Notice that you dont want to see 17 cards on river every spade, 9 or J are bad. On top of that Q and K are not greatest either. That it another reason why I favour calling.
I also think that this board is one on which even sticky regulars may find fold with AK/AQ - A high with 3 connected medium cards. That would be obviously disaster for us given how many strong hands he can have in range.
What hands does he come over the top with on the turn for an all in? If he does so with only sets and two pairs can we realistically fold because of his tight stats?
I'm praying that he is overplaying A8/A7/87 or draw. Not really exciting spot, but if you raise then you should just go broke there. Call is there probably slightly EV +/- depending on player.
I really didnt think this tight player would open that from first to act but it suprised me more that he c-bet a gutshot like this,
Well its decent hand to multi barrel. Also I remind you that after 70 hands you shouldnt label player as tight/loose/agressive/passive etc. So you shouldnt be surprised that player unknown for you can surprise you.