On most white networks like VH1 (I love New York & The Flava Flav show) blacks are shown as loud mouth & obnoxious. While BET shows the other perspective of black people that white networks tend NOT to show because it doesn't fit their narrative. For example there's a difference between black people and N*ggers and BET shows successful black people.
As a black man we get sick of turning on shows like VH1 and seeing the N*ggers of our community being the ones being featured on TV shows making us look bad so BET allows black people (Successful people of our culture) to be shown.
Another misconception to white people who don't watch BET is that they think everyone on the network is black and that is false. There's white actors on the network, it's more about black culture, you can be white, asian, spanish, indian and relate more with black culture. I have a white friend who I joke and say he's more black than me and he relates more with BET.
Also the BET Hip-Hop awards constantly has white people on there as long as they are a member of hip hop/black culture, from Eminem, Mcklemore, Iggy Azalea, Robin Thicke, Justin Timberlake, Justin Bieber, Asher Roth, Yelawolf, MGK,Logic,Paul Wall, Action Bronson and many more i'm forgetting their names.
But yea BET isn't intended for just black people it's a network that is intended to glorify the positivity of black culture and is accepting to all races that relate more with black culture than other cultures. If you allow white networks to broadcast their view of black culture you'll see violent inner city blacks being broadcast because that sells so BET cuts out the middle man and only shows people who are going to show black culture in a positive light.
BET use to have a show called "Teen Summit" it would broadcast every day after school where they would talk about violence in the inner city and improving the community BUT a lot of whites who have never watched BET assume the show is only for blacks and doesn't include other races which is false.