"A guy told me" is no source. When the Air Force plans from the beginning that half the class must be physically eligible for flight school then saying 98% who want to fly get to fly is like observing the sky is blue----what is more interesting is "how many pilots get their first choice out of training". The Air Force requires their flight students to accept one of four possible jobs: pilot, weapon systems operator (back seater), Battle Area Manager, or drone pilot upon graduation. Each one of those has a number of separate airframes and all depend on the needs of the AF at the moment (sometimes monthly) of graduation from flight school. That means you may train as a pilot and be assigned to sit in front of a radar screen as a Battle Area Manager as your new flying career. The Navy does a similar drill only all the pilot trainees will fly some type of airframe upon graduation. The only question mark for them is what type: jets, turboprops, helos. Which aircraft is also dependent on the needs of the service but at least they are not flying drones in Nevada.