During filming, they would switch identities: the white beauty headed to the street gangs to enjoy the adoration of the black gang members, like stars holding the moon, while the black girl was sent to a poolside mansion to revel in the adulation that typically surrounds gentlemen and ladies of high society.
Then, the black audience and white audience both got to see what they desired.
Black people enjoy seeing whites make fools of themselves, so the show let them see how, if white folks had the same deplorable living conditions, their outcomes would be even more miserable than the remarkably enduring black people.