What "other" things? Carpal syndrome is an official illness with clearly defined causes - squeezing and damaging nerves and arteries in the wrist, in the thinnest moving point of a hand. There are no "other" things (in the scope of this post, about keyboards) and yes, it is a fact.
Used to row about 20 hours a week for a few years. It does the same thing if you're not careful.