The problem with Insecure was not the lack of white characters. The problem was that the show did not reflect the community it was supposed to be about.
My wife and I were excited when the show first came out. She grew up in that area (and yes, she is Black), and I grew up nearby. But we were disappointed, and stopped watching. (I lasted a couple more episodes than my wife, trying to give it a chance).
The problem wasn't the diversity of skin colors; the problem was a lack of age diversity.
Where were the older people? Where were the kids? Sure, you can see them in the background and occasionally a character would talk to their Mom on the phone. Even though it was filmed in Inglewood, it didn't look like the community we knew. As far as we could see, this was just a Black version of shows like Friends and Sex In the City - Twenty-somethings running around with nothing else to do but obsess about their relationships with each other.
For a really good show featuring Black characters, you need to go back to the early Nineties, when Roc appeared on cable. Realistic characters of all ages, who like real people, spent most of their time working. Unfortunately, I can't find Roc anywhere now.
In the meantime, I guess we will have to travel centuries into the future, to watch Captain Burnham lead the Starship Discovery.