The reason this is "yawn" is its just a cooler, it happens. Its not terrible or anything to limp here, and played fine on the flop. That trash hand that flopped a straight is more likely to flop 2P and get it in just as quick. Or maybe they limped with 77 and now have the NUTS with an overpair.

People might say you should always raise IP here, but they'd be wrong. Against some opponents who make it easy to build pots postflop limping here is the right move.