1) men and women become more equal;

2) the remaining reasons for inequality become predominantly biological (because the social ones are reduced, while the biological ones remain).

But it is easy to make a completely opposite conclusion, such as: "if some differences are social, then all differences have to be social". And then, when trying harder does not change things anymore, it is only a proof that we need to try even harder.

My take is: don't describe things as biological unless you are damn well sure that they are. We (as a society) have been wrong too many times before.

(And similarly, this doesn't prove that everything is genetic. You can't get science by merely doing the opposite of other people's prejudices.)

The belief that nothing is genetic can also be used to oppress people. For example, you can dismiss highly intelligent people from poor families by insisting that high intelligence doesn't really exist and everything comes from universities, and then pointing out how poor people usually don't come from the best universities.

Any kind of incorrect belief can be strategically used to hurt someone.

This is still true today, to a certain extent (never is a heavy word). It's important to understand that Feminism isn't some authoritarian philosophy with a single set of ideas that you must subscribe to consider yourself a Feminist. Sure, some Feminists challenge gender essentialism in one way or another, but that doesn't mean all do or that it is a critical part of Feminism. The best way to learn is to talk to some local political groups.

What you're seeing there is an effect of the internet, not an effect of shifts in feminist movements. The internet gives everyone a place to speak which is great but the loudest/most astonishing/most disruptive voices are the ones that come out on top. Not the majority, not the thoughtful, not the ones who take action, not the voices who would like to have a conversation. If you dive past the surface I don't think you'd find modern feminism a joke and think that it has grown and matured. But I'm just one opinion

What we're looking at here is a bit more complicated; the modern situation (not just feminism but a number of different position groups) wants to downplay the existence of actual differences between the sexes. This seems partly motivated by existing, bad/biased science, and partly by the worry that if women and men are physically different, that people will use that as a basis for discrimination. I do see a bit of what appears to be science denialism amongst the "there is no male brain or female brain" crowd, which I find worrisome. Ultimately, I am with the second-wave feminists: people deserve equal opportunities regardless of their differences.

The right not to be grabbed or groped or touched without consenting, to be evaluated on ability to do the work and not on appearance, to have supervisors and coworkers focused on working together and not on how to date you.

These are all issues disproportionately impacting women, that are not requests for "equality of outcome" or that men and women are the same, and very much critical to addressing "equality of opportunity".

On the one hand we have women in Iran facing real dangers to take off their veils. Then on the other we have this strange group that deny science and demand we believe men and women are identical. I also reject this pattern where women should measure and compare themselves to men, and shape themselves into men. Which seems very anti-feminist. You're fine to do it, but to label that feminist is (I believe) wrong.

That men are raised with the social expectation to not find problem and to not let something impact them is not to say that women are impacted more by it. With reference to non-consensual encounters, there is a great deal of bias that refuses to see men as victims and even encourages them to see being the victim as a beneficial event for them.

But I would be very surprised if the overall number of men experiencing non-consensual touching was greater than the number of women.

There are also numerous self reports by bouncers in bars that point out how bad it gets and the extent of the double standard.

Or consider the case of celebrities openly admitting to such crimes of recent and the vast difference in social reaction based on the gender of the celebrity.