Yeah, 4,000 out of a cohort of 13,000 means you can be very selective. Easy enough to get rid of the real fuckups and the hell-no-way refuseniks. Give the rest some real choice in what they'll be trained for, and you might only have to say no to those with a clear mismatch between their hopes and what they are fit for.

It's interesting that they are choosing to draft both men and women. Not a lot of places draft women.