Whatever Happened to Carpal Tunnel Syndrome?
theatlantic.com
theatlantic.com
Folks typically don't get actual carpal tunnel from keyboards, especially newer (here, newer than the 90s) keyboards with much lighter key presses. Touchpads are much more resistant to even milder forms of RSI than mouses.
That and better keyboards and mouses are an easy and relatively cheap way to mitigate, so those who suffer from RSI pain at work can ask for ergonomic devices. It is hard to argue that they aren't "reasonable" accommodations under the ADA, so firms accept that they are required to purchase them.