Curl-1-out: But this isn't even a high variance spot - getting it in on the flop would be high variance.
We have a read on villain, flush draws bricked and were top of our range its as simple as that, click call or fold your entire range that's not a set including AK AA.......
It is high varience to get your stack in with a 5bi roll when villain x/r the flop. It is +EV to call and completely fine, but when you have such a small roll and villain takes a line like this, his range includes all of the nutted combos possible (excluding KK ofc) and we can't ever be sure with what frequency he is bluffing. Therefore he could (and is likely) bluffing with the correct frequency to call down, not disputing that at all and I'm calling 100% ofc. But if villain is not bluffing with the correct frequency (which is still possible and just because they are a "good reg" doesn't mean they bluff a lot - in fact if villain thinks we are a fish or a station he will bluff less) then the call becomes more marginal and the varience goes up. The FD missing may make him think we never fold Kx and panic checks for example, we can't know.
Also something to keep in mind is how many bluff combos villain actually has, he will be x/r al his nfd right? Probably KsXs But he will likely 3b AJs-Aks and some A2-A5s so in fact will only have A6s-ATs (5 combos) and some times Ajs A2-5s so least give another 2 combos 7 bluff combos total. Therefore villain only needs to not barrel 30% and we have 5 bluff combos to 6 value combos, making it still +EV sure, but a much higher varience spot ESPECIALLY for someone with a 5bi bankroll.
He can x/r some other flush draws ofc, and some nut bdfd so sure he may have more bluff combos which is why I still call, but saying that it isn't a high varience spot when it is completely possible that villain only x/r nfd (and not even all of them 100%) and then doesn't barrel 100% of the time eg turns AsTs and thinks he has sdv and check or w/e (not good ofc lol) so ends up with only 2-4 bluff combos OTR is kinda silly.
so Yeah, agree it is a call and the best line, but it is higher variance than you say and hero has a 5bi roll.