I think your average villain is shoving pairish hands- top pair, overpair, and sets- to try to protect against draws. I think shoving a pat flush OOP with 2 behind is more sophisticated, and therefore rarer, play. You've got to give yourself 8-9 outs to the nuts, with up to 6 more if he's got AT or jacks, or maybe top pair with a Qc, Kc, Jc. 9-15 outs = 36%-50+% to take the pot. I take the deal.

I think sets are likely here (which sucks for you) but not likely enough to muck.