I think like many have pointed out, there's a messaging issue. I want to feel like I'm welcome, even though I'm not culturally black, to consume content created by black creators on a platform that helps promote that content. I like k-pop, I like Bollywood, I like Sister Deborah, I generally enjoy experiencing other culture. I don't need attenuation. One of the strengths of America is the capacity for cultural exchange. "Netflix for black people" does not achieve that. It makes me feel unwelcome on the platform and triggers angst related to my opposition to the idea of asserting ownership over and further segregating sub-cultures being part of the solution space. If BlackOak is truly trying to promote black cultural exchange, then don't use exclusive language. I really have no problem with a production company like BET geared at being a space to promote a given subculture. Personally, If I was the founder, I'd welcome this type of feedback even if it feels tired because the appropriate messaging may be integral to the success of the venture.
Edit: Want to also point out that in practice we don't seem to attenuate messaging in black pop culture. It's some of the most explicit sexual and sometimes violent content in existence and it appears all over radio, TV, and the internet. I'm not saying it's exclusively that, but it doesn't seem to suffer from expectation that it be attenuated "for white people". If that were happening I'd immediately be on the side of any effort to stop censoring it because I believe in freedom of expression.