There's no shortage of applicants. They get tons of applicants every year, but the FAA academy can only accept a limited number to their 3-4 month training prog

There's no shortage of applicants. They get tons of applicants every year, but the FAA academy can only accept a limited number to their 3-4 month training program. Then they wash out roughly 50% of the trainees with their final exam, which is a set of ATC scenarios on a simulator. Existing controllers have to take the same exam to become a trainer at the academy, and roughly 1/3 of them also fail, so one could argue that the standards are set far too high. The survivors go on to their first posting, where they spend another year or two training before they can actually control live traffic on their own, and more wash out in this stage if they fail to certify.