Those are first world problems. In other parts of the world people are dirty and spend a lot of time in the sun but they’re working and sweating. Skin cancer cases are low.
Here we bath with soap and swim in chlorinated water then spend time in the sun with skin stripped of the natural oils. Viola skin cancer!
Anyway that was the explanation of one of my anthropology professors.
We also are obsessed with avoiding germs that our immune systems never fully develop, explains the proliferation of all of these weird food allergies.