>>716213462
Yes, they are moving the mouse with their wrist and not their fingers.

>>716214541
I've been playing FPS since Doom and Quake. Played every major FPS till 2012. Bad Company 2 was the last good FPS. I have zero hand issues. I stopped playing FPS because they were some how going backwards in progress and getting slower which is just boring.

I also played a shit ton of RTS and CRPG games. Did a lot of 3d and 2d art as well with the mouse.

Stop using your wrist to move the mouse, that's the big secret to not having pain in your hands.