Man, the issue is FAA ATC rules indicate that you have to be under 31 years of age and you must retire at age 56. Add on top of that a requirement of four years of schooling and if you don't make the choice to be part of ATC by age 27, you just are never going to be one.
I'm pretty sure there's reasons behind the mandatory retirement age. But dang, it's hard convincing anyone under 30 that they should pick up a pretty stressful job.