I think the best moral argument for reparations is this: think of slaves and their descendants as the abused and disinherited children of the American family, for four generations and a hundred years after the end of slavery. That someone like Davis has white ancestry doesn’t mean much unless she somehow inherited her ancestor’s wealth and position.
Nearly all whites were poor also until the twentieth century, but they did have the social status to benefit from the growing economy, and could enter the middle class. Blacks were hindered in this until the 1960s (yes some did benefit from good factory jobs earlier). The window for a comfortable working class life began to close in the 1970s and 1980s, with offshoring and mass immigration, so black families had much less time to benefit from economic uplift.
Against that argument is the pragmatic: welfare and dependency have wrecked the black family, and reparation windfalls won’t help. Accumulated wealth depends on stable families.
At some point the only way to overcome the effects of abuse is to refuse the effects abuse and to break the cycle.
Suggest you look up Sarah Breedlove if you think all blacks were poor and had no economic upward mobility until the 1980s.