This is not just black people. Entertainment is almost always valued highly over technology even in the general American population.
I think Marc Andreesen (not exactly sure if it was him) wrote about how companies that provide entertainment (YouTube, Twitter etc) end up being worth much more than others.
see:
http://www.thegrio.com/opinion/should-the-nba-assist-white-p...
I see parallels, it's a cultural thing, generally speaking in the African American community tech startups are not valued like playing basketball/football or being singer/rapper/actor.
The startups that are popular in the African American community is the record label.
I also thought this was interesting as well: http://deadspin.com/kyle-mcalarney/