Firstly, I wasn't making that claim. Secondly, that claim is easily falsifiable. The majority of the American military actual comes from middle-class households.
"Most members of the military come from middle-class neighborhoods. The middle three quintiles for household income were overrepresented among enlisted recruits"[1]
When you look at the educational attainment of those recruits, it erodes your claim. Just talk to some of them and you'll see there's virtually as many reasons for joining as there are recruits. The idea that there is one path for the college-bound (e.g., attending straight out of high school) is probably a contributor to some of the problems we see in college.
"Most members of the military come from middle-class neighborhoods. The middle three quintiles for household income were overrepresented among enlisted recruits"[1]
When you look at the educational attainment of those recruits, it erodes your claim. Just talk to some of them and you'll see there's virtually as many reasons for joining as there are recruits. The idea that there is one path for the college-bound (e.g., attending straight out of high school) is probably a contributor to some of the problems we see in college.
[1] https://www.cfr.org/backgrounder/demographics-us-military