That is a legitimate point I have no answer to. But things like the heirs law are modern problems for Blacks, it isn't like all problems disappeared in 1968.
My suspicion is that a long period of being beaten down has damaged the elastic of the Black community. Like an animal that is repeatedly beaten, too many have become submissive (I cannot get ahead so I will not try) or preemptively violent.
We know there were thriving successful Black communities. Some were sadly destroyed for the interstates. Others for other reasons. What made those communities work? How can we recreate them?
The Bosnians came expecting success, eventually. Same with Vietnamese and others. How do we return that feeling to Black communities?