Ohh, and Btw ... As I type all of these massive Walls of text... for the many years Ive done so... I do not have any Carple Tunnel issues...
YET... my wrist are currently bent at the forearm - to form about a 35 to 45 degree angle, while typing on this Laptop.
The wrists are made to flex a bit, and thats not really the big issue in such injuries. The problem comes from a constant, no-rest, usage... and the person not flexing and stretching the wrists often.. using a full range of motion roll and or shake.
As such, the muscles and tendons get way too tight... and start to knot up, and things get Ugly from there.
Many people have back injuries due to a similar reason. If your back into stretched and flexible... the muscles will be taught. If the muscles twitch suddenly, and voilently.. they will pull the very bones they are connected to, out of place. Hence, often need a Chiropractor to pop them back in place... as well as a lot of rest and relaxation, for the swelling, tearing, and injured / inflamed areas... to get back to normal.
So, if you are doing something with incredible intensity... non stop, rapidly... take many short breaks, and roll, stretch, and shake out the stress. Take a few deep breaths in and out to increase the O2 content, as well as to increase bloodflow pressure... and shake the blood back into the area of tension. As often, a tense area of use can get places where the tension has caused bloodflow to be weak in certain areas... and that compounds the issue over time.
This is why its so important in any straining situation, to breath regularly rather than to clam up and hold your breath. And why things like Martial arts... Tai Chi, Qigong, and even Yoga... promote and create great positive health changes. Slow deep constantly intense breathing, with the motions. Super saturation of o2, with a relaxed state of the body. Relaxed and flexible muscles, that work with fluidity, and graceful 'pinpoint precision' control.