Why are ''DARKER'' people always shitted on in every culture? Why it can be the other wise?

[Sigala]

Every skin complex has its own beauty, it's a always a certain facial feature that goes well with a particular skin color but why does it matter to you if someone doesn't look good? How can that bother you? Why would you add more burden?

this is from what I see and this may be the reason lightskin people are put on pedestal, if most darkskin people were attractive they also would be put to pedestal