Actually, I don't think that's the point at all. I think the point is that videos like this are spreading misinformation in general about back problems('riding the horse with his head in the dirt prevents kissing spines', 'humpy backs are due to not riding the horse with its head low enough' both of which are patently false and very misleading,) and misinformation specifically about dressage. The fact is that a great many horses have 'kissing spines' on autopsy, without ever having had any symptoms of pain or riding problems or anyone having done anything 'wrong'. It's not AT ALL clear that it is caused by not having the horse's head low enough, which is exactly what they (and similar folks in the same camp) say. In fact it is thought by many that it can be a part of the ageing, process or about an acute injury such as getting cast or falling on the back. That humped loin/spine that they insist is again, due to not having the horse's head low enough, is actually an extremely common sign - of lameness. It's actually extremely important that people NOT just try to get their horse's lead lower when they see this sort of appearance developing on the horse's back. This is important. It's not a 'debate', it's misinformation, and it's a welfare issue as they're insisting people overlook signs of lameness.