I think the best way to answer this question is to listen to what those who are currently underrepresented have to say about it.
So, did all of these uber-progressive white folks re-think their positions and use this as an opportunity for a bit of enlightenment? Not so much. They proceeded to discount this person's actual experiences, demean them, accuse them of being racist themselves, and actually got them banned from the forum. And of course patted themselves on the back for their valiant fight against racism.
Sharing power means actually ceding power and trusting that it will work out on average. Listening doesn't mean "talking".