while I get what you are saying, I have been playing the way those guys play now for 48 years, and have no issue with tendonitis or joint pain. Playing like that without the development and definition of using rebound, flow, and muscle groups correctly will definitely lead to issues, but if you train correctly, it is not that hard to play like that and be ok. In my case, the training to play that aggressive came from marching band/drum corps work/study of how to get speed and volume properly.
I also play with lighter touch when needed, so I am not just a one trick pony...AND, the training I did to play aggressively has also really helped me in my touch for softer, or lighter techniques as well. It has definitely allowed me to know how to manipulate muscle groups to get the effects I need