I mean I disregarded the fact we hard block any 9x hands so yeah he's unlikely to have J9 89s A9 etc but there are still a lot more 2 pair, top pair and combo draws in his range than sets and straights. For him to be beating us he either flatted AA pre or flatted a set or straight on the flop. I think we can disregard JJ/QQ for that reason given this is a scary flop for a set.

KT can absolutely slow play this for one street, so I'm not taking that out of his range, and he has all combos. That's a lot of combos. But no way am I folding a set against a donkey because he might have flopped the nuts. If we're not stacking this against him we might as well just give up poker because we're going to need the nuts way too often if we want to make money.