Gearhart was known more for gay/lesbian activism than as a feminist. Due to that double stigma, of being a woman and being homosexual, Gearhart fantasized a lot about female separatism. That idea was making the rounds in feminist and lesbian circles of the time.
The 10% seems to be a bit of an arbitrary number, unless she got it from theories about population bottlenecks and the adherents, most of whom were and are male, BTW. Ironic that you call agreeing with male ideas about their own value in cataclysm situations as misandry, yet you don't recognize the internalized misandry that creates those ideas and their ilk in the first place.
Anyway, at the time she gave that lecture, environmentalist had entered the equation and there was beginning to be push back on rampant, unfettered and unchecked, polluting industrialization. Ideas around restoration of the planet to a paradise by elevating and restoring the feminine back to it's proper place equal to the masculine but leading in human reproduction specifically, have been woven in feminist thought ever since.
She had some good ideas and her visions were sublime and also tragic. She was short sighted in a few ways, particularly in that she failed to envision an organizational structure that was balanced and did not give hegemony to one group over another.
But I don't see these ideas as evidence of hatred toward men. I see it as evidence of loving the planet and thr human race.
After all, how can you say it's hatred against men when men themselves agree that during a population bottleneck, it's more important to the survival of the species foe more women to exist than men? Remember at the time, there was. Another of concern about population overshoot and thrn collapse. And she wasn't including herself because she didn't have or want children. She was never going to reproduce. Further, she never once suggested that men be slaughtered or male babies be murdered or aborted. She felt like this could be accomplished via technology, slowly over time.
She also didn't say it had to be that way forever, just through a transition period to restore the feminine. She didn't say it wouldn't need to be maintained either, that was kind of vague.
She also never advocated men be kept in some sort of slavery or forced labor, like marriage and religion have done to women.
So. Not misandry. Radical though experiment under certain conditions and with certain goals in outcome, yes.
