If two guys hunting gear and a small trailer noses the truck high and wears your tires, I would check to see if something else is wrong. The specs (0.4ish if I recall to 1.1 ish) allow for full safe suspension travel and while maintaining proper tire wear. I again speak from experience that 2.5 inches of front lift doesn't exceed factory spec. So if you're higher than that going down the road with that load, I would look for weak springs, proper weight distribution, or maybe airbags if the load has to sit truck tail heavy. Plus if it's changing enough to wear tires, it would seem steering would certainly get light (have experience here as well). That one gets a little scary for me, but I know some folks like the adrenaline rush of driving with your tires off the ground every other bump.
Ive got pictures of a ttb loaded to near 40k gvw with no discernable to the eye camber change (what wears tires) if that's not loaded and still fully functional I dont know what is. We won't discuss the overloading issue haha...
Point being, there shouldn't be a scenario that the truck was designed to handle that causes tire wear if everything is going parts wise. So I'll stand by that they are only as bad as the maintenance people give them, like any other vehicle