I think in FFYL, the shocking racism aspect is what drives the film, it is made as a potboiler so by the end everyone is going nuts when Jessie Lee and the others get their deserved comeuppance. It brings everyone together. It differs from Blaxploitation films where you know youre going to see the title character as the main focus doing diff things to move the film forward.
Jessie Lee Kane just happened to grab a black woman instead of a white/Asian/Latin woman. It wasnt their race that saved them, it was them just doing what anyone would do in that situation.
There is no funky theme song after it ends proclaiming they got back at The Man. 
