Men have always been in power, since biblical times. White men are the American ruling class and have been for centuries. The journalism is valid. It punches up at the ruling class.
Discussion
I think the article would have benefitted from being less polemic and more pursuasive. Reads too much like preaching to the choir and ignores the mental and emotional diversity that white American men (and Asian men, as they're the foreign competition) display.
They are, after all, a gigantic group and overrepresented in the scientic/engineering specialty. You could select differently among that group and get a better result.
Men tend to be in power because wielding power is a dangerous act of violence.
Women can only be in power if men abdicate power, but then we are only in power at their leisure, which is a form of benevolent condescension that promotes cognitive dissonance. I think society pays a high price for this, especially when it tries to enforce strict quotas.
I prefer to focus on making sure representatives are truly considering the interests of all constituents.
To illustrate, I wouldn't feel better represented by a female radfem, socialist from Seattle than by a Catholic family guy, Bitcoiner from Annapolis because I'd expect him to at least know and like people more like myself.
I also think there are different forms of power, that are weighted differently, so "being in power" doesn't necessarily reflect in how far decisions will be made to your benefit.
Children, for instance, seem very powerless, but their interests will tend to be valued higher than those of adults.