First, I enjoyed the article, even as I found myself struggling with it.
To the endless simmering cauldron of emotions about "not all men", please bear with me as I share a few thoughts. It's not (just) fragile egos, though the defensiveness, anger, male entitlement, and sheer denial is undoubtedly a *huge* part of it. The problem as I see it, is this: saying "all men..." do X is sexist, just as saying "all women..." do Y is sexist. I just don't see how we can get around generalizing a entire gender, no matter what convoluted academic arguments assert this. But it is also true that this particular sexism is a pittance next to the legitimate rage from women who have endured abuse after abuse from some men. There are many of us men who consider ourselves ardent allies, but we aren't blind to this problematic sexist language. We just choose to remain silent (and not always silent) because we want to support our sisters who are fighting a bigger fight. The ones that defensively reply are usually less far along on their emotional growth and less empathetic to women's abuse, I would say. But none of this changes the plain fact: generalized statements of "men..." and "all men..." is sexist, is an indictment of an entire gender and it can hurt to hear, over and over.
I'll say now that this is where I am right now on this issue, but I'm still learning. I'm always open to hearing an opposing point of view. And for what it's worth, your words have never offended me, and I am sorry you've (and every other assertive female writer) has had to endure the stereotypical masculine backlash. I hope this response lands as intended...a kind and curious differing viewpoint. Thank you for sharing!