...bsms, If you don't know how outrageous some of your comments are (such as dressage training is only for parades) I feel sorry for your horse. I can see in your picture that you are not in balance. Your horse is showing his discomfort with the head elevated, bracing against your hand. Too bad you have no interest in correcting your position.
You are the nitwit that claimed dressage went back to Xenophon. It doesn't. It wasn't even a dominant form in the 1800s, and still isn't today!
No. Dressage is NOT the end all of good riding. It was designed for the riding done in military parades, NOT military riding in the field. The US military looked at it, and rejected that style for riding in combat.
Do I want a horse to move 'with collection' down a desert trail? Nope. Collection is harmful to moving in rough terrain. Let the horse pick its way.
Nor is it useful for running races. There is a reason you don't see jockeys riding like a dressage rider - they don't get paid to lose. That would be the same reason reiners don't adopt the "classical techniques" - they don't like losing competitions. They do what works, even if it is too "simplistic" for your refined tastes.
My horse is not showing discomfort by having her head elevated, nor is she bracing against my hand. I ride bitless, and usually with a slack rein. My avatar comes from a cropped picture where I'm turning her inside to miss my daughter on another horse - so THAT rein is missing slack. And she is an Arabian, and considers herself responsible for her 'herd'. She is ALWAYS at least partially on the lookout. But it beats the snot out of stuffing her chin on her chest. She can see where we're going. What a concept!
My position IS too far forward, and my back stiff. It has been stiff since Jan 2009 when I landed back first on some rocks. As I sit here typing, my back is STILL stiff, and the area above my right hip is tender. That is one of the reasons I've switched to an Australian saddle: to help me relax back into the saddle. The English jump saddle in my avatar doesn't help me do that.
I don't know enough or ride well enough to be a reiner, and probably never will. In that sense, I suppose I shouldn't have posted on this thread at all. And my objection isn't to dressage, which is largely an admirable sport, but to the idea that dressage defines riding for everyone else.
If you want to ride 'according to the classical principles of the past masters' ("sniff, sniff"), and to do so while competing in reining, have a nut. For my part, I'd respect dressage riders more if their horses noses were higher, and the riders noses were lower.