as slaves were specifically imported from West African rice growing regions to work on rice plantations in the southern USA, I can see why they might have had enough of the pretence that they were all happy and smiling about it.
I know; nobody's suggesting that they used photos of any of the original slaves. As I said, they'd have looked a lot less happy. They did actually hire a former slave to play Aunt Jemima once, though
Just on a practical note, I've noticed that Uncle Ben's isn't that good anyway. It's got a definite tendency to clump together into molten lumps when you stick it in the microwave - more so than other brands, including the supermarket own brands that are half the price.