At the same time, I think you've hit on the crux of the point the site is making. You might find it interesting to explore the idea at one level deeper.
I don't know if you identify as a straight, white male, but if you do, you can see how frustrating it feels to be categorized in this way.
Now imagine the majority of panel discussions you attend, board members you see, politicians, etc. all in minor ways, perpetuate that same level of marginalization.
A panelist always seems to be making jokes about how brogrammers are unconsciously racist, the boards of companies are all wearing Muslim garb (with a token white guy thrown in every once in a while), and the number of "people in power" who are supposed to represent you never seem to have the same skin color you do.
If we (I'm a straight, white male) are able to tap into the frustrating that FAQ generates in us, it may help us understand the perspectives of others better; which I personally believe, is the key to doing something about it.
Trying to pretend we're all equal hasn't worked, because we're not all equal - the ecosystems we live in are never a level playing field. Trying to pretend they are exacerbates the problem.
If instead we try to empathize, and understand the experiences of others though, maybe we can be open to making the changes in ourselves necessary to making the playing field a bit more level.
Which is why I appreciate your comment - it represents your true perspective, which makes intuitive sense. I think if you're willing to take the author's argument the next logical step, you might find her/his perspective some makes sense as well.