wilbur - sure villain is a fish, but he's a passive fish (as described). Using the reasoning 'oh it's a cooler if i lose' is generally a bad excuse. His river raise is also pretty damn big which for fish is generally a sign of the strength of their hand. From his perspective we should have a hand here, we bet almost full pot etc..

With all that said it's still hard to fold a boat to a fish but this seems like one of those spots.