I'm not suggesting we shrug it off, not batting an eyelash. It's completely idiotic and should be mocked appropriately. But I'm guessing (with high confidence) that if the frequent posts about this brand of stupidity were replaced by articles discussing the actual roots of the "science/technology is for men" prejudice, and blog posts from, say, the khan academy, on how they're working to fight those conceptions, you'd feel a heck of a lot more welcome, and the many, many women who are just on the "no" side of getting involved in the tech industry would be much more likely to get involved.
I'm not trying to replace criticizing language with fixing deep problems. I'm trying to replace criticizing language with discussing, directly, deep social problems. They're the same order of complexity, and one helps much, much more.