Just a technicality, Officers don't enlist but they do sign a commitment paper very similar to enlisting. The only service that allows a rank below officer to fly (Warrant Officers) is the Army. My information is only about 20 years old, so maybe it has changed, but you used to be able to get flying slots in both the Navy and Air Force before committing, depending on the entry program. Most people I know who wanted to fly, joined first and foremost to fly. Yes they were giving something to their country, but they were getting something (flying) in return. Your right if you joined to fly and you don't get to fly, you are going to be one pissed off person just like those pilots in the Air Force who ended up flying drones from a desk.
This is why you need to get lots of information before signing up for any branch of service. Recruiters will tell you whatever you want to hear to get you in the door within limits. Regardless of what you hear this is what they do, but nobody can force you to sign anything.
I completely agree that joining the Air Force, Navy, Marines, etc etc should be because you want to serve your country and not to get a pilots license. It's certainly not an easy normal life, and it's definitely not for everyone.
However there are many pilots that earned their pilots license in a branch of the armed forces and continued on to fly for commercial airlines or become private pilots. There have also been several military aviators who have gone on to become Astronauts as well.
I have known people who enlisted in the military, particularly the Air Force, who joined groups like the Aero Club ,and worked hard to get a private pilots license at no or low cost compared to paying for lessons at full price privately. They weren't military aviators but they still found a way to get their pilots license. I also knew people who were promised whatever they were promised, and ended up hating their time in service and felt cheated or washed out of a career for whatever reasons and got out as soon as they possibly could.
If, if you decide to join a branch of the armed forces for whatever reason the facts are that:
* They have programs for
anyone to get a college education.
* They offer programs for most people to become officers and will help you get the college education needed. See this link:
http://www.military.com/Recruiting/Content/0,13898,rec_step04_questions_usaf,,00.html#how_officer
* You might and probably will serve during some sort of conflict or war.( Especially now)
* Military life is different and can be difficult at times.
* You are subject to different laws then civilians.
* You might just have a good time and do things and experience things that you wouldn't have been able to otherwise.
There's nothing wrong with spending the money on a private pilots license. You can still end up flying small planes, and eventually over time you can work your way up to larger more complicated multi-engine aircraft. Some airlines will pay for training as well depending on the airline. I hope that you achieve the dream of becoming a pilot, and I wish you the best in your decisions on your future.