The problem is you're focusing on the physical ability, and completely ignoring the psychology of the soldiers on the pointy end of things.

Just because someone has the raw physical ability to do something doesn't mean they are suited for the military. If their presence is going to be disruptive to the team, they're not fit to serve. You don't adjust the mindset of 40 soldiers in a platoon so you can make one fit in, it just doesn't work that way. The 40 will find a way to take care of the one, and chances are, unlike DADT discharges, it won't be covered by the media.