They have separate kitchens for the prep, the cleaners work while they’re out on the yacht, they have people to do the buying, and the restaurants they visit have very well trained staff who stay out of the way.

Also, they're not building the house or the jet, they're not growing the food, ... people close enough can be chosen for willingness to be sycophants and happiness to be servants. Unless you're feeding yourself from your own farm, or manufacturing your own electronics, there are limits to even a billionaires ability to control personnel.

nah, if slave owners like Thomas Jefferson and George Washington could reorient their entire lives around not seeing the "ick" of chattel slavery I think modern billionaires can do the same thing even easier now if they wanted.