You're all really nice, enlightened, guys.

Your average infantryman or tanker is neither nice nor enlightened.

Think of a platoon of 20-30 with one woman in it.

What's going to happen?

Best case - all the horny teenagers get themselves beat up/killed trying to impress her.

Worst case - she gets raped.

Just look at what happens when a woman enters the Backroom.

50% of the guys try to hump her digital leg, the other 50% proclaim themselves white knights who will protect her from the leg humpers and she promptly (and wisely) leaves.

The army is about 100% worse, I would say.