“what you do, not who you are.”
Who you are determines what you do. It’s a character thing.
And what you are determines what level of temptation you are exposed to in certain situations.
We have security clearances because people who ARE a certain way because of their history and evidenced by their behavior, would be tempted to do the wrong thing with highly-sensitive information if they were placed in that situation. Somebody who doesn’t make top-security clearance can still handle other levels of responsibility that wouldn’t pose a temptation for them.
To take gay guys (for instance) and put them in the same bunks and showers with other guys, where there is no incentive for them to keep their sexuality separate from their work, would be like taking a red-blooded hetero guy and putting him in the bedrooms and showers with the ladies. Might be do-able if he had to pose as a woman and could be fired if anybody even found out he was a guy, but it would never work if he was able to openly be a red-blooded guy.
It’s a temptation issue, and it’s stupid of the military to play with it. As it is right now, I doubt that military guys would have a problem with a gay guy who was minding his own business. Even if they knew he was gay, as long as his sexual life wasn’t in their face all the time they probably wouldn’t care. Live and let live. But when you have to sleep and shower in close quarters with somebody it’s a whole different situation.