system
Given the following post, respond as if you're commenting on Reddit:
human
Why do "all-black" institutions still exist? Primarily, universities/colleges.

I was driving through an all-black college the other day and thought to myself in a very simple manner, "Why?" If colleges are really to prepare individuals for the real world, why shun certain races? Why purposefully surround yourself in only people that are similar to you? At the very least, shouldn't a university force us to interact with those that are far different from ourselves? I felt that during my time at a very culturally/racially mixed college, that it was the best thing I could have done. I found new ways to interact and learn from people who had very different backgrounds and cultures from my own. If I were to attend an all-white college, I would have been doing myself a disservice. 

Can someone explain why these institutions still exist and possibly, if a redditor has attended one, what were your motivations for doing so?
gpt
Quite a few institutions which people think of as "all black", are actually HBCUs- Historically Black Colleges and Universities.  While these institutions were historically places for Black students to attend (partly because HBCUs were created prior to to the Civil Rights Movement of the 1960s to serve Black students since segregation was still legal).

Currently, HBCUs allow students of all races to attend, but many still have high Black student populations.  You can theorize all kinds of reasons for why this happens, including institutions being slow to change, HBCUs tending to have more professors of color, to it being nice to be part of a majority on campus.  Location is also key, as HBCUs were originally located in slave states, so they are geographically situated near where large populations of Black people settled post civil war, and where their descendants still live today.