if everything you do is move over stuff from the whiteboard to the computer yeah you wont type much.
but that’s not the kind of programming that exists, there’s a lot of trench digging.
I was writing mainly JavaScript all day. The main culprit was my wrist posture. They were squeezed together in front of me and at an awkward, flat angle while typing. Even with a sit/stand desk, multiple breaks, etc. the pain would build up over the day.
I thought RSI was mostly for documentation writers and emails people.
Ref: programming for 25+ years. I only had problems when my posture was bad. Lucky I guess.