Picking off a c-bet with a c/r extracts value from the same part of his range we're trying to get a fold from with a lead. Not as much, sure, but at much lower risk to our stack.

I simply don't want to play a big pot with 66 OOP. I'd rather take the pot down now if I can. He's likely not bluffing from the HJ pre so if he's got a bigger pair he's gonna let me know. If he calls a flop donk he's either floating or has me beat, so I just want to get to a cheap showdown if that's possible and it often won't be, and if he raises I can let it go.