All I'm saying is that wild horses have no topline. It's something really created by man, to carry a rider. There IS no lifting of the back in the gallop, THAT is why all TBs on the racetrack except for a slim few (and they usually are too heavy to do well) have NO topline. It's not used in galloping. If it's created by carrying a rider in a nice, round and correct way of moving, an hour or so a day, how's a wild horse going to have topline?
Besides, conformation that it good for us is good for a ridden horse, in work. Bad conformation flaws that would mean lameness later on really means nothing to a wild horse because he's really never, ever in heavy work.