The point is the military wants people who are easy to control: people who are controlled by their emotions are easy to be controlled and molded. Being amenable plays into it, but so does having emotions without life experience to judge and harness those emotions
It depends on the military you're talking about. Militias in the Congo? Maybe. Modern militaries? No. They look to break you of your individualism. That little bit of attitude that says, "I matter more than we" is an absolute detriment to small team operations in the military. They spend a significant amount of time, after breaking the individual, teaching recruits collectivism. The military I was in absolutely advocated stoicism and restraint. It's what they call "bearing" and you're continually graded on it. You're also encouraged to read a lot of warrior culture literature that talks about these things in great detail.
Good faith question for you: where did you get the knowledge about the military that you used to make that comment from?
