I can't speak for everyone, but I think a lot of people who were more active at their HBCUs did a lot of cross functional events and interactions with other campuses.No offense but how can you truly rate a college unless you attended? I'd say even stayed on campus to truly get the full experience
I know a lot of my family is tied in one way or another with schools too and I'm always doing the recruiting handhold every few years for church or stuff.