Yea, but what about horses that only buck in one place. A Perfect school pony we have will buck near the far corner. You can circle him there to your hearts desire but he will keep bucking till the sun goes down. You can't just ignore that corner. He's perfectly sound, bitless bridle so the kids won't bug him, feet are great, back is good, and saddle was made for him.
When I asked my question, I was talking about constant buckers. Some horses don't have a vice that can be fixed. Sometimes horses just kick naturally, just like for some humans, the automatic response is to hit playfully.
Or even a horse that is fresh and bucks. I would rather train that horse to find a better way to expel his excess energy than to buck and risk injuring himself or others.