First off please do not take me to a lower standard and basically say I'm not horse smart because I have not demeaned anybody. I do not agree with that statement because it matters GREATLY what you put in their head, but also on their head. If you put something that causes pain on them you can get them to do WHATEVER you want like you said, but that isn't real horsemanship. Lets say you can get your horse to turn on a penny with a bit. Okay...but the horse isn't doing that out of respect for you or because you asked him too..he is doing it because that's what the tugging and pulling says. It doesn't mean he likes it.
Bits properly used do not cause pain. Does not matter what is on my horses head I can cause them pain even with a bit less bridle.
If a horse who rides in a bit was in pain doing so then horses such as reining horses would have a big problem doing what they do. The very definition of a reining horse is to be willingly and effortlessly guided. If the horse is in pain that is not going to happen. Also if I have to move my hand more then a inch that is not going to happen. Also if the horse is being injured in any way from the bit or my spurs I am automatically DQ. All that time and money put into that class is gone. It could be as little as a scratch.
How many times have you had to drop bit and be judged in such a manner?