Quote Originally Posted by NonBinaryNyan View Post
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It's similar (though not identical!) to frustrations when a mobile, non-disabled actor plays someone in a wheelchair--especially a character who is unable to walk. (I don't mean "they broke their leg badly so they're in a wheelchair until they heal up again," I mean characters for whom a wheelchair is a necessary tool in daily life.)
There is also a amount huge of disabilities making the pool of actors to pull from not only small but fragmented. I would imagine it can be a casting nightmare for studios and a lot of the time it's just easier and quicker to cast a known actor for the role.