Anger as man without a beard cast as man with a beard.
Anger as woman with straight hair cast as woman with curly hair.
Anger as man with white skin cast as the Hulk.
Anger as non-enhanced man cast as Robocop.
Anger as man who can't fly cast as Superman.
You'd be surprised how often they want real something or others to play a something or other particularly medical or legal people actually - just saying.
The "uproar"* isn't exactly because an actor is going to act -- it's because, in so doing, he's taking away a role from someone else who is, at least in principle, more suited to play the part.
For myself I'm not particularly bothered, but I still figure it's worth pointing out the difference between protesting Jack Whitehall's ability to act the part, and protesting the resulting loss of a high-profile role for an up-and-coming LGBT actor.
Pantomime dames don't come into it, nor do doctors, bus drivers, or whatever other completely inadequate comparison this thread can come up with.
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