There are ignorant people on both sides of the spectrum. The context of the opinion article has merit, and is a valid concern one can have.
If the point is, "Our warfighters should be unified and focused on warfighting, looking together in the same direction toward the enemy," then I agree with you. These articles conveniently leave out the amount of utter horseshit that non-straight, non-white, non-male individuals deal with based on those aforementioned factors when they try to be a part of that unified force.
The common talking point is, "You give up your identity when you join the military, and we should be focusing on the mission, not on your individual traits." While I fucking agree with that, one would be ignorant to assume that's what's actually happening. A lot of people do want to serve their nation without being reminded about what makes them stick out, but the military is full of people like the commenters below that thread who bar that possibility.
EDIT: I was reading an article about Capt. Amy Bauernschmidt awhile back to learn about her background, and a ton of the comments were, "I don't see what the big deal is, if she's capable, she's capable -- why bring up her gender?" Super common, and naive, talking point.