Looks like you're a fellow PC enjoyer.
Although, I'd say depending on the keyboard and how your arm and wrist are positioned, a keyboard can do the same thing.
Sure, but there's a possibility to find good keyboard, that won't ruin your wrists.
The design of a controller, paired with the fact that they are usually used for extended amounts of time makes them inherently unhealthy.
There's no controller that won't add to wrists' wear out.
I have no ihea how much it weighs, but it was real. Apparently very useful for Phantasy Star Online, it might even have been indended for it but I can't be sure.