The military always makes its rules adapt to the needs of the moment.
When I was drafted I had qualified as a concentious objector (forgive the spelling, I don't feel like looking in the dictonary right now). I also originally had been disqualified because my eyes were too bad, and major ear problems. Guess what, the lost the paper work on objector, and changed the rules about how bad your eyes and other health problems were. (I had to have special glasses for my gas mask).
But being smart, I knew how to beat their placement tests and became a company clerk. I got orders for Vietnam on three different occasions, but as a clerk, knew how to get out of them each time. I turned down officers training several times because that meant immediate transfer to Vietnam.
Sarah L.