First off, every discipline I can think of has it's problems. At the end of the day, no matter what we do with our horses, riding itself is unnatural, and it's the job of the rider/owner/trainer to do what they can to pick up the slack that nature hasn't "planned for", so to speak. Support boots, good nutrition, a solid conditioning plan, etc. to prepare the horse for his job, whatever that may be.
I did read both articles.
I'm not impressed. The articles read like someone watched a few Youtube vids and didn't like what they saw. Certainly the writer is entitled to his opinion, but as far as swaying my mind, I would like to see evidence of research beyond anecdote. Back it up with evidence
that shows that reining horses on average break down faster or worse than horses of other disciplines performing at equal caliber. I personally would want to see evidence, something along the lines of x-rays of a horse after, say, 5 years of reining training and competition vs. a horse after 5 years of racing, jumping, dressage, whatever. Writing an essay based on opinion and apparently isolated horror stories of worst-case-scenario situations isn't a good way to come across as credible, whether your concerns are founded or not.
Lol, I'm avoiding writing a research paper for school, can you tell?
Also, his apparent belief that roping/cowhorse events are better, I believe that many reiners are cross-trained on cattle?? Correct me if I'm wrong on that...