Fashion Photography in the past concentrated on sophistication or models who were sophisticated.
Today's fashion is baggy jeans, and sweatshirts. Put anyone in those clothes and they smell not of sophistication but of skateboards and the street. Gum chewing was at one time considered sophisticated, when people didn't have enough money for gum.
Today's bubble blowing bimbos and gum snapping sluts don't give that aura but are still used in fashion spreads, more often even than before.