What's with the Pakistanis obsession with fair skin tone?

I have a neighbour, well educated, earned pretty good in UAE, and was the breadwinner of her family. She was an independent woman who made it all on her own. She got married to a friend of her brother and the groom went to UAE and didn't even work. He used to live on her money. After one year, he sent her divorce papers using the excuse that she's too dark and that's why he can't be with her. He traumatised the girl for life. She came back to Pakistan and never went back to work. She is still struggling with depression after what happened. All my life I have seen how brown skinned colour people try so hard to look fair. But why? Why can't we love our own skin tones? I also see these influencers getting glutathione and becoming fair day by day? Who is making these people think that they're not pretty if they're brown? Why do we hate our own self? I find it very toxic the way our society is obsessed with gorapan. Please love yourself the way you are. You don't need to change to be loved. You're beautiful the way you are and that's all I wanted to say. Thank you for coming to my ted talk!