they are really just pedantic twits that very well could have commented the same stupid thing to a man.

Yes, but men experience this at a slightly lower rate.

So if an astronaut man were to get, say, 10 of these comments, while an astronaut woman gets 15 of these comments, it's fair to infer that about 5 out of the 15 comments wouldn't have been made to a man. Problem is that you can't exactly tell which 5 they are. But you know it's happening.

Of course, if the ratio is actually closer to 50 versus 10 comments like this, then you've got a pretty good sense that 80% of the pedantic overexplainers-to-an-expert are doing it because the original poster is a woman.

And one thing you find for these types of examples with a woman who has clear, unmistakable, objective indicators of expertise (literal astronaut) in the topic at hand is that the ratio is much higher for women than men, in a way that might not have been obvious for lesser credentials (like a high school science teacher). But yet, it still happens.

It's a name for a phenomenon that has existed for a long time. It's a concise way to describe that phenomenon, and I still think it's a good word to have in the vocabulary.