Part of the problem is that while the academy and being a cadet is indeed "Joining the Military", it is also a University that is competing with other schools for the Creme of the Crop. So, the academy has to use "Common Denominators" so they can compare themselves with OTHER universities; in a language that 17-18 year old kids and their parents (With little/no military background) can comprehend. Whether it's the academy admissions office concentrating their advertizing, town hall meetings, college fairs, etc. and concentrating on the exceptional education you'll receive; or the athletic department using words like "Blue Chip", "Recruited Athlete", etc. to attract a student athlete. It is the academy's attempt to compare Apples to Apples. The Air Force academy vs USC vs Ohio State vs UCLA vs Princeton vs the UniversityofWhateverTheHell.
The "Enlisted Recruiter" that most people are familiar with, do similar comparisons. They talk about the "Enlisting in the Military" as a "JOB". They talk about unemployment rates around the country. They talk about the cost of health care insurance. They talk about the "Training" you'll receive in the military and how you'll be able to use this training later on to expand your career and future. The difference however is; everyone knows that when you "JOIN" the military...... "It's not JUST a Job, it's an ADVENTURE". Corny phrase, but it's true. People realize that the military, while a job that you get paid for, is "THE MILITARY".
The academies emphasize so much about their education, which is definitely 5 of the best schools in the entire country, but they don't mention as much about the "Military Service". Yes, they mention that after graduating, you owe 5 years on active duty. But they explain it in a way that makes it appear that the academy and the "REAL MILITARY" are 2 totally separate things. Throw in the fact that you're told you can change your mind any time in the first 2 years, and it's no wonder so many people don't realize the academy actually is "Joining the Military". Few realize that in time of war, there's a process in place to move academy seniors out early so they can get into the "Real Military". Many don't realize that there are actually things you can do at the academy that can put you in JAIL for a number of years; while if you committed the same offense while "Off to College" at Purdue, you'd probably get a slap on the wrist.
17 year old, graduating high school, and ENLISTING in the military....... 17 year old, graduating high school, and ACCEPTING AND APPOINTMENT to a military academy..... "EXACTLY THE SAME THING" when it comes to being in the "Military". The only difference, is that the cadet, has the option of changing their mind for the first 2 years. The pay structure may be different as a cadet. The responsibilities of a cadet are much lower than that of an airman. A cadet may have other rules, policies, and restrictions on them vs the 18 year old airman. But make no doubt about it; the cadet has definitely "Joined the Military".