I suppose that assumes a woman cares about fashion and that fast fashion is something every woman wants to buy into. A lot of women I know shop vintage because they want items they can wear reliably for years and modern items do not offer that level of quality. If you want to buy out of the fast fashion assumption of "need" it seems like you have to literally go back in time because if you buy fast fashion it is literally trash in a year. Nobody will thrift it worn because it will be worn out. It doesn't seem like brands have options for women that lie outside of this system in addition to those junky options or offer those junk items at a lower cost. If all you can buy new is junk then stepping outside of the system requires you to avoid the ease of simply buying new off the rack. It requires work and luck. If you grew up inside that system that's your established normal.

We can say that mens fashion is static... But why can't both gendered fashion silos have more static options or at least price fast fashion at a different price point to reflect those cheaper materials? It seems like saying one sex has inherent requirements for fubgibillity which seems honestly kinda sexist. There's a lot of men who want more interesting fad like stuff and women who want staples that will last a decade.