Note that I never said that castrating a dead hog would improve (or make edible) the meat from a big dead Boar Hog. I did say that some folks around here, in central Texas, say that's what ya gotta do. For me to prove or disprove that, I've got to shoot and eat (and castrate 50% of the Boars) a lot of Boar Hogs. As I said, I use Boar Hogs for coyote bait, so the testing isn't going to happen. And....unfortunately I can't seem to find a hog or a coyote that needs shootin.
And for what it's worth, I agree with you on the dim effectiveness of castrating a dead hog.