The Major is correct, sir. I spent over 20 years in both the Navy and Air Force and can attest to what he stated. They will give the answer that they think one wants to hear.
Again, that may be true for some but, certainly not an absolute for everyone. People join the military, & or fight for different reasons. Coming from a family with at least one member from every generation dating back to the American Revolution serving, I felt compelled to serve from the time I was a little boy. Oddly enough, I had zero pressure to serve from my immediate family members. I was raised by a single Mom. She was shocked, & cried when I told her I had enlisted. She didn't understand why I wanted to serve. I just felt it was my duty, & I wanted to experience what those before me had.
I have 3 sons. All 3 are on active duty. They all joined the Marine Corps (I was Army). My oldest, after 4yrs in the Marines, switched to the Army & is currently in the 82nd Airborne. My younger 2 are Marines. As hard as it may be to believe, I didn't pressure any of them to join the military, & tried hard to talk my youngest out of it...lol. I was really hoping for him to go to college. He said he may still but, wanted to serve as enlisted man as so many of his family members have. Of the 3, only my youngest has any understanding of current politics. My oldest 2 boys have next to no interest in politics & couldn't tell you who the Governor of VA is, much less discuss major political topics with a remote understanding of either side.
What's my point ? Many people enlist in the military for their own since of honor, pride, sense of duty, etc.. I joined during peace time (late 80's), & served during wartime. My boys all joined during active wartime. All of us (at the time) without much, if any, understanding of the politics of it all.
It doesn't take much for me to imagine some of the same thoughts, or personal feelings coming from my own ancestors, & or their neighbors.