How bad is bad in modern dressage?

It is hard to understand how people can ride their horses like its done in the world cup warm up video. I wonder why the rider cannot see the extreme pain he causes through this warm up. How did their ambitions disconnect them from the art of horsemanship where cooperation and partnership between horse and rider melts together.
The horse is very sensitive can feel a small fly on the back leg that it gently sweeps away with the tail, so using double up metal bits and lots of arm strength should really not be necessary when training the horse.
The horse is by nature very curious, enjoys learning and new challenges and will respond to the lightest signals if there is communication between the horse and trainer.
Being with horses could be such a pleasure for both parts and they could perform together in harmony. Most of what I see in horse sports today is only a fake superficial pleasure for the rider who goes for money, medals, and fame, while the horse has been degraded to a thing you buy, use and sell.
The Blue tounge is bad, now how bad is bad in modern dressage?
I do however think we are up for a change, thousands of people are starting to question if pain, force and violence is needed in their companionship with their horse. And is it worth it? Do winning those medals really feel good?

Thank you for this site, thanks to all readers, activists and to EPONA TV for their braveness. (less info)