Why not?
The military can be an entry level job and a way to fund a college education after enlistment.
The military is a bootstrap up for a lot of HS grads whose parent(s) can't manage financially to send them to college. We should have paid continuing education in the US -- we don't now. I would prefer that new enlistments be after their 14th year of some schooling (community college or trade school).
The military can offer some technical training and more importantly -- self discipline. People with self discipline achieve more in life.
A lot of countries have mandatory military or government service (as an alternative) for all youth for 2 or 3 years.
Do you object to girls that are 18 being in porn -- what is the difference really? Being "damaged goods" in society or maimed or killed?
Free World ...
Young men have the stamina for combat -- can you force march 30km that well when your are over 40
