Well, ranch-bred QHs are bred to do a job. I have worked cows with my WB and am amazed at the athleticism of real cow horses. The hancock horse I mentioned would likely excel at dressage if he wasn’t so reactive. His owner, a professional trainer, tells me all the time I can ride him whenever I want. But just having watched the horse try to take him through the arena fence when he asked for a canter after not working for a bit, I tell him I’ll wait a bit for a more solid foundation before getting on him
I can buy that horses with slight sickle hocks can have an advantage for sitting, but I wonder how many of them stay sound working at that level. Many WBs don’t stay sound at FEI.
I knew a QH that competed at GP. I am not visualizing how a downhill QH is correctly schooling GP.
Yes, 80s WBs were literally out of working stock. 1990s Olympic horses couldn’t qualify today.
I still believe the average horse can pull off second level correctly. Above that, most average horses can’t extend and collect at all gaits, cant provide “jump” into the canter and flying changes, can’t pull off great lateral work correct at that level, etc.