I am a doctor (both an MD and a PhD) and while I think that while there is a problem in general with arrogant doctors mouthing off in public about topics of which they have little knowledge, they certainly don't have a corner on that market. As my handle states I have 4 kids and, as I practice adult radiation oncology, I defer to my wife, a pianist of all things, to more effectively than I handle their childhood ailments.
The problem with pitching, IMHO, is that we don't know what is the root of the rise in arm trouble. I would again defer to those who know better than I such as the guys at Florida/Texas Baseball Ranch, Dr. Andrews, kinesiologists studying this scientifically, etc. to help figure this out. It however makes sense to me that a more fluid use of the core would protect the arm from excess wear and tear, and I cringe when I see "inefficient" fast pitchers put their arms at awkward angles and visibly stress their arms. I think as we apply kinesiology to pitching and find ways to better use the legs/ butt/ core to generate power we will see a drop in arm trouble but that is purely an educated guess.
As long as colleges keep accelerating the commitment process, particularly for young teens throwing hard, kids (and their parents and coaches) will strive early for velocity. I would like to know what percentage of kids in the top 95th percentile in velocity at say age 15 are in the top 95th at age 20, and those who are 50th at age 15 in the 95th at age 20. These types of stats would be interesting and potentially instructive. Perhaps the sabremetrics gang can tackle these early predictive data - perhaps they already are working on it?