fold turn? we have fd too?
Yes I know. But we are out of position with 9 high against an uncapped range with terrible visibility...

Seriously though, as everyone has realised, we are not exactly fist-pumping to bet the farm when we hit our backdoor flush; to
some extent we still only have a bluff catcher. So it's not like we have this amazing equity hand on the turn that we can't possibly fold. In fact we have a hand that actually suffers from reverse implied odds. Obviously if the board had not paired on the turn then everything is different.
BTW, just to clarify... my initial post in this thread was recommending checking rather than leading the river - with a view to check-raise jamming. This was written when I had misread the hand history and not seen that the board had paired. I still think this is
by far the best river play on an unpaired board, and that leading is just bad. With the board pairing on the turn, if we get to the river then we should still check-call rather than check-raise. Leading the river is still bad. I think the majority of posters recommending leading the river (either when the board has paired or when it has not) are not thinking properly about the opponent's range and which parts of this range we are able to target for value.