[pseudalopex]

The technical meaning of disability is broader than the legal meaning. The legal meaning is broader than most people would define it.

Using a wrist mounted touch screen is hard if you can't use the other hand. It doesn't matter if it's because the other hand is missing, in a cast, or just holding something. So people in relevant fields talk about permanent, temporary, and situational disabilities.

You don't have to like or use the term. But arguing with people who do won't be productive.