Since they have a mandatory retirement age of 56 (if they're not retired earlier for health conditions) it's not crazy to have an age cutoff for intake. Why put

Since they have a mandatory retirement age of 56 (if they're not retired earlier for health conditions) it's not crazy to have an age cutoff for intake. Why put someone through a 2 year training with a high failure rate if after they make it through all of that you'll get at most 10 years of work out of them?