Sadly, the only way to even discuss culture's role without being labelled a bigot is to discuss the cultural differences within white Americans. When you're talking about how cultural traits prevalent in Appalachian communities like the one I grew up in exacerbate inequality, suddenly you have an audience. See the author J.D. Vance who wrote 'Hillbilly Elegy', and has subsequently become a darling of the political left.
It's funny, because my time spent in poor white communities and poor black communities allowed me to see how radically similar the two communities cultural traits often are. And also very similar is the fact that these communities have mixed within them families who go against the grain and succeed by not succumbing to the cultural norms around them.
Thing is, if we're honest, it's a lot easier to become popular as a minister or a politician when you tell a disenfranchised group of people that they are victims of someone else than to tell them they need to fix their own culture. Poor white families whose fathers abandon them have the same issues as black families whose fathers are absent, but the media would rather focus on the edge cases where racist cops shoot black men without cause.
Nobody ever asked black Americans to vote for a spokesman. Instead the media has decided that Al Sharpton and his ilk should be the ones consulted as to what black folks care about. He's in New York like they are, so it's easy for them and lucrative for him. In the meantime, kids hold signs saying "Black Lives Matter", but nobody wants to hold a sign that says "Black Dads Matter" even though a movement like that would do more to help black America than any government program. 70% of children being born out of wedlock has a huge effect, whether anyone is willing to admit it or not. And blaming incarceration solves nothing. The majority of absent fathers in the black community are not incarcerated.