I am not against leggings. In fact, I own several pair. But I'm not sure I understand their raison d'etre.
In winter one wears leggings and socks inside boots, but in that case, why not just wear a pair of warm tights?
I like the look of leggings and sockless feet in flats, but if it's chilly enough to cover my legs I probably need something to cover my feet, too.
In warm weather, some women wear leggings under dresses, but it seems odd to encase one's legs in lycra when the point of a summer dress is to let air circulate.
The logic of leggings escapes me. What have I missed?