Perhaps for Kenny G, though the question posed was about musicians. Lester Young advised not to be a repeater pencil.
Are you really say ing that, if you're a creative musician, playing all sorts of different things all over your instrument, RSI isn't a problem? Or is it a joke.
(I think it's a joke.)
MG
A bit of "joke", but I found that, as a player, I didn't do all that much of the same thing, over and over again. Playing saxophone, there are different horns, and your fingers (individually) are called upon to do different things (e.g., manipulate different keys in different ways). It's easy to change relative horn/player position, and merely sitting versus standing versus marching versus bar walking gives dynamics to the kinesiology.
Piano I played less, but I found myself more restless in doing so. In that sense, I suppose my body may have been alerting me to a hazard.
The repetitive stress injuries I've had (minor ones) have come about when one or more "key" positions is fixed. Bicycling, for instance.
I'd be interested in (other) musician's thoughts/opinons. (I don't think of myself as a musician.)