Why do men always go for a woman whose cute and not a 10/10?

I've noticed this attractive men have no problem dating a woman whose overweight or just cute 6 out of 10. My friend has absolutely no problem with getting dates or in a relationship. Shes 6ft tall and overweight. My uncle married my aunt whose very overweight. It's always the least attractive woman in a group of girls who'll treat you way better than the more attractive girls. It seems to me men are fine with Average especially if they treat the man well.