If they really wanted to get people to fill these roles they wouldn't require them to go through the whole basic training garbage they require for entry. The type of people who would be good for these roles are not the type of people who will go through basic training. Which is why they go to the private sector and then get hired as a contractor thus bypassing the entire process and probably making more money anyways.
If I'm not mistaken, there was an article a month or two ago (at work so not much time to search on it) that was talking about the Air Force dropping requirements for physical conditioning (IE., no basic training, no staying in shape). So they are already working on that aspect of their target audience.