Bedrockgames
I post in the voice of Christopher Walken
These are linked. Again, why do you think all Genies have slaves? Why is it specifically mentioned as part of the main entry and each sub-entry? Because it's a call back to Arab culture.
If you are having trouble finding it, it's partly because it relates to the trope of Arab decadence: rich Arabs have such opulence and wealth that they own many slaves and do what they will with them. This is on full display with genies and the slavery part is absolutely something that continues on today: to give an example, the villain of the Taken movie is a Sheikh billionaire who takes on kidnapped sex slaves. It's an aspect of a greater stereotype of Arabs, which the Efreet are the worst about (because they are outright villains) but all genies play into.
Again, I think we just disagree that this is much of a stereotype. Arab billionaire, definitely. That exists. I am not sure that is a negative stereotype though (there are plenty of movies and shows with lovable Arab billionaires). But I don't think there is a strong association in peoples minds with slavery and arabs. More recently perhaps because there is more awareness of the global slave trade. But I still don't think it is a strong association (there are lots of places where slavery still happens, and where things like indentured servitude still happens----I think a movie like that was just drawing on real world material rather than indulging a widespread stereotype: slavery is something that exists in the Arab world, so if you have a billionaire Arab villain, it is something a write might draw on....but you might also see it movies where the villain is from any place on a map of modern day slavery (just look it up, there are lots of places where it still exists in some form).