Any time the word 'privilege' is used non-sarcastically on the internet I get a bit worried.

Oh, well then. Here's hoping that if the usage is not on the internet, you take it seriously, at least.

I understand there are places on the internet that go overboard on the privilege bit, like the Social Justice Warriors of Tumblr, but it is a real thing and does exist.

Were I a woman, I would feel patronized by this,

Well, you're not, I am, and I don't. It's not just about women being equal. It's about overcoming ingrained structures of discrimination, whether conscious or not, and you can't simply do that because eventually "we'll all recognize the equal merit of women and it'll even out." This doesn't work with race, either. Tell that to the NYC stop-and-frisks. Tell that to black men who get pulled over or searched "randomly" multiple times within a year. Tell it to the fact that women are still making less than men. Oh, you tell me that’s because women were discouraged from taking STEM majors? I believe we would call that institutional discrimination, actually! That would be the term for this.

Rich white men (Who only a few years ago were broke, white, boys)

Wealth stays with wealth. 2

Second point, this is Tumblr-activist mentality at it's[sic] finest.

Oh. Oh wow. So much doge. You've lost me here. If you think this is Tumblr-activist mentality at its finest, you don't spend a lot of time on Tumblr. Or better. This article is thought-out, reasonable, perhaps anecdotal, but based on reality. Tumblr-"activism" at its finest is anything but. This comparision deliberately skews the rational, reasonable stance of this article to make it seem less credible.

are actively trying to keep anyone in a position of minority out of their field, when that's simply untrue

No, it's not. There's no accusation here that it's deliberate. There's simply an observation of a phenomenon that is probably a result of ingrained societal structures and expectations, which seems pretty clear when the author starts talking about magazine covers and normative culture. He's talking about inherent societal structure, not deliberate "boys' club" exclusion - though that might be happening too. No one put up a sign on Bitcoin and said "Boys Only." That doesn't mean it didn't happen anyway.