Since most of them eventually want children, aren't they going against their own biology (they're shooting themselves in the foot by doing that) by spending years into dead-end relationships.
Meanwhile men are being more careful with their resources and their gatekeeping role, the women aren't careful with their youthful years, aren't spending it wisely and getting out on time?
Instead you hear more stories of women spending 4-8 years, continue hoping they will have kids, etc. Why even take that risk of spending years, of wasting your best years?