Pianists are very (like 60%) susceptible to RSI, especially if they have small hands [1] (= lots of stretching motions). I think it's a tradeoff — moving your forearm around spares your wrists, but puts more strain on your elbows. I wouldn't be surprised if it's better overall, though, just because it involves a wider variety of movements.

[1]: https://pubmed.ncbi.nlm.nih.gov/12611474/

Anecdotally, I have large hands (or at least long fingers) and early piano lessons, and as a self-taught chaos typist on QWERTY I struggled with RSI at a relatively young age until I switched to more traditional touch-typing on Dvorak.