There's nothing "wrong" with flatting sets on the flop on draw heavy boards. There's a lot to be said for being able to represent a wider value range on the turn. I bet people like IOPQ float a lot, which, seems awesome b/c someone on 2p2 made a post about it once. However, what people forget is that if you fastplay every strong hand in your range your flop calling range becomes ridiculously weak and exploitable.

Sauce talked about this once in a video I believe, blew my mind at the time.

It's also really cool to be able to jam sets/draws/etc... on the turn against people who will barrel weaker parts of their range b/c they auto put you on a draw. Or, the best part is flatting twice and then jamming the river against 2p2 bots who check to induce with hands they should be value-betting against typical call-call ranges from aggro taggfish who would have raised flops w/ draws and strong made hands.