It’s also true that people will look at the posture of Olympic horses and try to mimic that.
From what I can deduce you can take a very hot forward horse that has naturally superb gaits, and you can ride Rolkur and on the forehand to achieve certain gait effects, if you are a highly skilled pro with impeccable timing and release, and if the rest of your training is basically correct. And if you have enough horses in the pipeline to cull the ones that melt down under this system.
However, if you take an ammie friendly horse under the guidance of a mediocre coach and low level ammie rider, and put this much compression on it, the result is generally a long term disaster. The horses get sour, they go short, and then they blow out the hind tendons and retire.
I don’t like the overbent foreward tilting posture of many high level competition horses, and I won’t buy any Anky branded products, even when they are very pretty and on deep discount!! But I do recognize that these upper level riders are getting effective consistent results within their discipline. I don’t like aspects of that discipline, of course.
When lower level riders try to mimic this by riding spur and crank or BTV or don’t understand lateral work as foundational, they mess up their horses and get nowhere.
Correct riding matters a lot for lower level horses and riders. The riders don’t have the finesse to be selectively harsh or cruel and then release. They ride like that all the time and the horses either get full or explosive. Also the horses don’t have the power or forward to keep offering impulsion under harsh hands. They need correct development.
I have watched this play out a lot in the past decade.