From what I know, it can happen randomly to any person throughout their lifetime.
Though, this is also something that is caused by strain. Many people who lift weights experience carpal tunnel, it is very unfortunate. Though in the fitness world, equipment has been designed to avoid putting continuous stress on the area. Though the safer alternative doesn't give the user better gains at all, sucks.
A barbell like this, can cause severe strain.
Where as a barbell like this prevents it, at the cost of a good workout.