I think that you don't understand how few people who end up in the military have a choice or volunteer because they want to serve. They volunteer because they have few to no other options to support themselves.

Military recruiters know this and swarm those high schools/areas. I went to a high school in rural CA with less than 25% of most graduating class doing any post secondary schooling due mostly to economics. We had at least one branch of the military on our campus every day of the week. My husband, who grew up in a wealthy bay area suburb never saw a military recruiter on campus. Period.