Because most of us are over 32, can't pass the military medical (asthma, eyes, flat feet, small disqualifying issues...), or we don't make the grade on the resume, or we don't know the right people in the right unit....

You don't just walk into the AF Reserve office and say, "I'll take one pilot slot, please!"

This is ignorant. MANY pure civvies would have loved to go military, but couldn't for one of several reasons. This notion that it's always a civilian guy's fault for not joining is absurd.