Thanks for the detailed response.
There’s a lot packaged in your response, but I’m not seeing anything that is related to the amateur status of a rider.
We clearly have different experiences, and that’s too bad. I’m sorry that yours have been so bad. It seems your fundamental issue is with the overall method of scoring dressage tests in competition period, dot. Yes, good training should be rewarded, and yes, I too have seen poor riders on fabulous and incredibly generous horses outscore average but well ridden movers. I’ve also seen average but well ridden movers outscore poorly ridden “better for dressage” horses.
I believe the root of your issue is in dressage tests themselves, the associated purpose and directives in addition to the USDF/FEI scoring methodology. Essentially, the ideal standard in use.
I happen to have 3-1 handy so using that as an example, the purpose of the test includes things like demonstrates increased engagement, especially in the extended gaits. If your horse’s extended gaits aren’t markedly different from the collected gaits, well, that’s going to score lower than a horse that does show a difference. Increased balance and self-carriage is easier for a purpose bred dressage horse much the same way that basketball is easier for tall people.
Of the 23 movements in this particular test, the word engagement is in the directives for 16 of them. Quality of gait is explicitly listed or implied (reference to rhythm, elasticity, suspension etc) in 21 of them. So the fancy horse isn’t just getting the big gaits score in the collectives, but pretty much a bump in most of the test movements. I know you know this.
That said, the rider’s skills are also being judged in every movement too. Can’t steer; it’s going to be tough to have good geometry in your test. Can’t sit the trot; well, that fancy boy isn’t going to lift up his back for long if you’re pounding his kidneys.
I would say that both movement and riding are rewarded, however, that movement / natural talent in a horse makes the test movements easier so there probably is more bang for the buck there.
That all said, I agree with Lilo Fore that good movement shouldn’t be penalized. People have suggested that, saying that if a horse is moving with an uphill balance at training level they aren’t demonstrating a TL outline so should be marked down. I think that’s BS.
I think USDF and frankly horse sport in general is in decline for a number of reasons but the biggest is cost of keeping of a horse, not purchase price or showing expenses. I’m in LA county where board at a safe facility with decent footing ranges anywhere from $600 - $1000 a month. One of the largest stables in Orange county, over 200 horses, just was sold for real estate development. That’s the biggest problem our horse community faces, not showing fees.