You are right about extra weight on the front helping, but you are missing the fact it's a twisting motion that's causing the grief with a lifted trailer. Without a WDH, the ball will work side to side as well. There are limits to how far, most off roaders either resort to Australians style hitches or carry a spare coupling to replace the bent one for when the 4x4 and the trailer are in very different planes. The friction bar will only help with tailwagging, a lateral motion. Unless of course you mount a couple of friction bars vertically , like sea legs. It likely could work, it sure would look pretty weird.
