You are REALLY stretching the matter by applying those scriptures. Most slaves were cared for quite well.
You know that for a fact?
That is yet another Southern myth.
They were so well cared for the South had to pass laws for the Federal gov't to go into Northern states to retrieve them (so much for States rights)
The slave owner had the right to beat his slave (read the history of Frederick Douglas), and ofcourse the women were his to do with as he pleased.
That and the fact, that the family could be sold apart at any time.
No doubt there were good and kind masters (such as Washington and Jefferson) but power does corrupt.