I'm sorry. I didn't mean to make it a debate (besides, I don't like to debate). I just wanted to understand. I still don't fully understand, but I'm grateful to you, Wolf Man, for trying to explain. Just like many things, I will surely understand one day.
Oh, one more thing. If it consoles you any, my sister tried to get in the army. It was the Canadian forces, which I think are supposed to be a little less harsh than the US Army. During the training, she started smoking under the influence of the other recruits; and now after many tries, she can't stop. And then, she was permanently (but thankfully not too seriously) injured at the knee because of the very harsh training she underwent. Now she's quite limited in her physical activities, and of course wasn't allowed to join in the end.
I'm not sure why I'm saying this. Perhaps I thought highlighting a bad experience would relieve you a little from your pain of not being able to fulfill the career you dreamed of. Because as much as little as I understand the will to join the army, I certainly do understand your utmost disappointment. I hope you can find a career that will make you as happy.