Heh heh heh. You are kind of amusing in your child-like simplicity. Did you happen to learn about slavery from a pop-up book?
So are you saying that being educated by your employer/owner, having your children educated by him, getting his assistance to patent one of your inventions, getting perhaps two weeks vacation each year, having your family freed by him and being given a mercantile business, and accumulate the financial wherewithal to buy a $300,000 plantation...
Is SIGNIFICANTLY worse than:
Working 7 days a week in a factory, having your family live in a squalid tenement, your wife taking in laundry and sewing, and keeping your children at home from school every day to do piece work?
Chew on that a bit, go back and read what I actually wrote, and maybe you'll have on those "Ooooooh, I see now" moments. Or maybe you won't.