Whenever someone starts talking about "crip-drag" - the slang term that basically means "currently non-disabled actor playing a disabled character" - the conversation tends to eventually (usually sooner, rather than later) turn to this:
But but but! We shouldn't accept a less-than-stellar actor just because they're disabled. That's, like, Affirmative Action GONE MAD!!!!!! No, you just have to accept that they always, totally, without fail, and without any influence by ablism or assumptions about what stories they can tell about disabilities, the casting directors chose the best person for the job. And it's just a wild coincidence that the best person for the job is almost always someone who doesn't have a disability.