I would say that there are a lot of organizations that are doing it as a matter of course, that are choosing to do it and that recognize that it's necessary. Perhaps it should be: Have all of you taken it? Have I?
I have in lots of different contexts now, but yes, I think we all get something from that experience. We can't know what we don't know, and the training would vary. The kind of training would vary by job role and organization. That's where it would get tricky, but I do think that training is a fundamental piece of changing the culture.