Where are the T.B.s shipped when they are no longer winning races?
I've seen jumpers with blown out knees - certainly not in the best interest of the horse in the long term.
I don't think anything is probably harder and more un-natural than to make a horse jump 4 feet or so. It is not something they do naturally in the wild. Am I against it?? NO - because as I stated, no discipline is perfect.
Practically every discipline has "useless" horses if they are no longer winning.
It takes years to train a good roping horse, so it is in the best interest of the owner to take the very best care of his/her horse.
And as far as the bucking horses? I've known several that have made good riding horses. It is the fleece bucking strap that makes them buck.
When the rider comes off and the pick-up man releases the strap the horse stops bucking. Same with the bulls, who probably work a few minutes a week.