(1) you're positing "Black adults in America" as a monolith that all essentially think one way about government/Dem party politics; and (2) the notion that healthy skepticism of government (government that has innumerably demonstrated its corruption of power/abuse - particularly towards certain communities) as "conspiratorial" and in-line with views only a crazy uncle would hold.
Even when you look at the 2020 primary polling data, you'll notice a diversity of views across a vast spectrum among Black voters. There are *significant* generational and geographic differences that debunk any notion of a monolith. Black voters under 40 hold decisively more progressive views than older Black voters, typified by the voting breakdown of those who voted for Sanders/Warren (Sanders decisively won the under 40 Black vote) versus the older Black voting community which came out in droves for Biden - and indeed - he wouldn't have won without their support (buoyed by Clyburn in SC). Also, Black voters in the South vote differently than Black voters in Nevada, or California, or Michigan.
The idea that those voters who opted for more progressive candidates (or hold more skeptical views of government) didn't grow up around Black people is a weird take, with no evidence to support it.
There is absolutely a strong tradition of the evangelical left and the Black church in the south fusing with Democratic party politics, and that's one of the reasons Black voters (particularly in the South) tend to vote more conservatively and have become a stalwart for moderate/conservative Democratic politics. There's also a significant elite that has developed within that circle (something Cornel West often refers to as the CBC gravy train) - but that trend is being disrupted among younger generations. The electorate of 2030 will look quite different than the electorate of 2010.
Incidentally, I grew up around a lot of Black people. I moved a lot as a kid, and two of the communities I lived in and went to school in were predominately Black. In some instances, I was the only non-Black in some of my classes. I'm even a member of a historically Black legal fraternity. I've lived in many different countries and have also spent considerable time living in predominately Indigenous/Latino communities.
What I can say - for sure - is that never once in my life did I witness wholly monolithic thinking of any group, maybe except for a certain contingent of conservative whites who demonstrated far more groupthink than many other communities often cited as being purportedly monolithic in philosophy.
Another example of this fundamental misunderstanding is in the view that an influx of immigration from Mexico and Central/South America will ultimately lead to a massive infusion of Democratic voters, but that's not what's actually happening. Republicans are actually getting larger portions of that electorate than most realize.
But yea fam - flex away if you want - but maybe people just actually have honest disagreements with your unconditional cheerleading of Establishment Democrats. Maybe it has nothing to do with where they grew up. Maybe they aren't being "conspiratorial" and are just assessing the institutional rot for what it is.