Walls are coming down.  It has nothing to do with readiness.  My father was a vet, he says there were gays around before it was legal.  It doesn't matter, its about readiness.  The same with women or transgender people.  

In the military, more people are standing up all the time as they find themselves serving with people that have their backs, regardless of societies preconceptions. 

I'm a white American man.  I'm not saying this for my benefit.  When your so called "standard" goes beyond readiness, its time to change.   

“When less than one percent of Americans are volunteering to join the military, we should welcome all those who are willing and able to serve our country,” McCain said in a statement. “Any member of the military who meets the medical and readiness standards should be allowed to serve — including those who are transgender."