The analogy that several Black users have said, is "Mastodon is the digital equivalent of fleeing 'regular' racism in the deep South, just to experience 'racism doesn't happen here!' racism in Boston." ??
Mastodon has more cultural norms around not talking about racist abuse, than around preventing it from happening. I don't know how to convince y'all that this is bad.
So yeah, this creates an opening for centralizers.