Um… If they really had a choice, the vast majority would not join the military. There are exceptions of course. But most feel they have no other options. Just like technically you don’t have to pay your taxes (you can file a form to have nothing withheld from your paycheck). But it is the best choice if you want to make a living. So still, very much valid.
If you read my first comment, I explicitly said “of their own free will”. I do not pay taxes out of my own free will, so your comparison is invalid.
Um… If they really had a choice, the vast majority would not join the military. There are exceptions of course. But most feel they have no other options. Just like technically you don’t have to pay your taxes (you can file a form to have nothing withheld from your paycheck). But it is the best choice if you want to make a living. So still, very much valid.