I get your point. When I had RSI in my right elbow and tried to find a replacement for a traditional mouse there were soooo many attempts. And I had to use them for a while both to see if they helped, but also to see if I managed to use them properly. Like, a mouse where you rolled a ball with your thumb I never got friendly with even after a few weeks.

In the end the problem was actually moving the hand away from the keyboard, so no tilted mouse, thumb mouse or track pad worked. A RollerMouse saved me. I even game with it now, heh.

Just lucky my company paid for all of it (and the ones I didn't use they got back by me distributing to others within the company with issues)