Key travel isn't the single cause for RSI. I don't have RSI pain with a mechanical keyboard with huge key travel for an example.

For me, key travel isn't the issue, it's the bottoming out impact. A lot of people are hitting the bottom really hard, which actually increase the chances of RSI.

My mechanical keyboard also has a soft bottom out so that I don't actually have to hit anything, just gentle tap and it's all good. I can't actually learn to tap gentle with low key travel like Apple's keyboards. Strangely, I don't seem to have the same issue on the iPad's smart keyboard.

Apple keyboards are the worst for me with RSI, it hits bottom hard and it's too thin.

Maybe confirm that butterfly mechanism, for all its faults, limits RSI

Personally I have one of their separate wireless keyboards, more travel than the MBP itself has but still low profile (lower than the Mac itself).