As I tried to point out, there are a host of reasons for the collapse of the black family structure in this country.
If we use 1960 as a baseline, 20-22% of black children lived in single-parent households. Over the next two decades between 1960 and 1980 single parentage rose to nearly 50% by 1980. The numbers peaked over the next two decades rising to just over 55% in the mid-1990's. It has gone down in recent years but remains plateaued at roughly 47-50%. Hardly a triumph in the restoration of a stable family environments for half of this country's black children.
It is political gamesmanship to point to a single factor driving this persistent pattern. Most serious students of the issue point to proud economic changes broad economic changes, urban manufacturing declines, changes in welfare policy design, and shifting social norms in the black community (and more broadly) regarding marriage. And yes, drug related sentencing also played a role - as did an explosion of inner city crime that corresponded to the crack epidemic leading to those more draconian sentencing guidelines.
Nothing is simple and nothing is the exclusive "fault" of either political party or administration. No matter where bias leads our finger pointing, fatherless households remain a significant persistent, now sixty years and counting, problem within the black community that has improved only marginally. So long as conditions encourage the George Floyd's of the inner city to be the role models and heroes of black youth, little is likely to change.