Someone correct me, but I think STEP's intent is not so much how lore-friendly, but is it still close to vanilla but just enhanced. While many of them sure are pretty, most are not recognizable from their original characters. Skyrim is harsh. Aside from some nobles, most of these women are fighters and workers and I would expect them to not be so flawless with styled hair. But I do agree there are some that are supposed to be considered pretty like Camilla that I've personally tweaked to be more fair in face. I've used the vanilla hair version of Inhabitants of Skyrim in the past and thought it was well done and mostly in keeping with vanilla. But I think most STEP users found even that far too pretty.