While I understand why this is being suggested here, it's *extremely* limiting to tell a writer to write *just* what they know. If we did that, there would be NO fantasy, very little fiction, and the writers who have researched and really tried to understand another viewpoint or opinion would be silenced. Not sure that is the way we grow, as people or a society.write about what you know.
Agree with you @whiteraven. Well said. I have a friend who is a writer and he takes classes and has won awards and in one of his classes one of their assignments was to specifically write from the perspective of someone completely unlike them. He researched with TED talks and then the only verification he had was reading it in front of his class.extensive research and someone familiar with whatever challenge it is following behind and verifying that it rings true at least to their experience.