Nah, the idea is not that it's the leave that sets any single woman's career back, it's that the expectation of the leave being taken by women causes them to no

Nah, the idea is not that it's the leave that sets any single woman's career back, it's that the expectation of the leave being taken by women causes them to not be hired/promoted/... before having children that the OP is concerned with if I understood them correctly. If suddenly all parents were to take leave, regardless of gender, then discriminating young people by gender would no longer make economical sense. There should definitely also be mandated minimum vacation days in my opinion (where I live, four weeks of paid leave per year are the legal minimum for full-time jobs), but that's quite unrelated to the issue at hand.