> No one criticizes him for speaking with his dialect of English. He doesn't have to code switch. He speaks the way he speaks, he's understood and respected.

This is an anecdote, not a rule. It's good that no one is judging this guy based on his accent, but that doesn't mean no one ever has or no one ever will. I guarantee some people will hear his accent and subconsciously (usually) form an opinion based on it.