I haven't been involved in the horse world for 20 years, but it doesn't seem to be a place involving swift change.
Back when I was involved there was a great deal of openly accepted abuse of horses. It was standard to 'make' or 'force' a horse to do some thing.
This involved whipping from a mounted rider or one not mounted using a long lunge whip, (Not designed for actual whipping, but very capable of being used for this purpose).
I've seen children whipping their ponies furiously, adults whipping horses until they leave wheals, riders furious that their horse is refusing to pass something that it is scared of whipping them forwards, unseated riders beating seven shades of shit out of their terrified horse, parents whipping ponies that are trying not to be loaded into a horse box.
The above are just a few examples. The beatings were generally accompanied by screaming, yanking and sometimes a nasty kick or knee to the belly.
This wasn't hidden. It happened in plain sight. Less acceptable during a competition admittedly- until a competitor's horse underperformed or refused a fence after which no one was surprised to see the rider beat their horse.
I saw this at every level from riding club gymkhanas, through pony club events, very causal clear round jumping, dressage at all levels, hacking, competing in fact everything except racing which I was never involved with.
I absolutely hated this culture. I felt in the minority as someone who didn't use a whip. I kept and rode a series of horsies, and I did more or less ok in terms of the sport. But I did more than ok in terms of loving and respecting my horses. I was an oddball though, and was judged as soft and daft. I was told so many times "don't let him win" and "show him who is boss".
My horses may have preformed reliably better if I'd beaten them when they didn't do as I wanted. That doesn't make it right.
Bearings and whippings are an integral and accepted part of most of the equine world. I'm surprised we've not seen more leaks of this nature because I doubt many top level competitors are interested in a kinder approach.
CDJ