Exactly. I’m wondering how DeSantis thinks the slaves applied the “skills they learned” for their own benefit.

Let’s say a slave learned how to be an expert blacksmith. Great, but what does he do with it? He can’t exactly ask the Guy Who Owns Him As Property to set him free to open a blacksmithing business. He’s still a slave and has to do whatever his master orders him to do. There is no “personal benefit” when you’re a slave.