Floaker

I think it hasn't really improved, but it could do it if wrestlers could feel they had the ability to refuse an angle for being racist/misogynistic/abelist/homophobic and would get the support of the locker room in doing so. It would also help if audiences called out and rejected any bs and supported wrestlers who where caught in a bind by them. While not about cultural respect but able to draw a parallel, think of the sexual assault angle from this year's Royal Rumble. The whole setup of WWE made me have to stop watching because even in the unlikely scenario that Lynch had came up with that angle, she did so I can a structural framework that encourages and supports the promotion of sexual assault. Her continuation within the company relied on playing to those misogynistic expectations. If the angle was suggested by someone else, what choices did she have? I'd suggest go with it or leave the company - no real choice at all.

That's because that is what the OP is proposing in an askance way. The claim is that if the person coming from a different ethnicity than they portray then this shows we are all the same and race doesn't matter. This argument is an act of ignoring that racism/white supremacy is more than just individual prejudice but is a structural system to preference white people over others. Just because someone comes from a different ethnicity than they portray, the use of racism and jingoistic calls to the nation are still identical. The structural effects to belittle or enhance are the same. With blackface it was to portray black people in a certain comedic/savage light (EDIT: a role that many black people were put in a position to portray themselves). In these and all the wrestling cases in the OP the performance has been used to reinforce nationalism and/or white supremacy. I'd suggest the OP look up articles covering colour-blind racism.

Here in the UK acting and stage hand rates are set by Equity, the actors union. Different types and level of performance have different rates. I don't see why wrestlers couldn't develop their own rates for different performance types and join Equity - they are entertainers after all... https://www.equity.org.uk/resource-centre/rates-and-agreements/equity-rates/