This bunch of “unmotivated young men/people” are the least likely to get a war eagerly started but are REALLY only willing to fight if it’s necessary (e.g someone invading their home country and firing artillery at their home village).

In most countries the military doesn’t serve “the people” but the will of politics.

If a big portion of your military IS YOUR SOCIETY (e.g., young men very happily doing a lot of stuff except bombing the shit out of a random country) - it reduces the risk of some bogus operation.

Having conscripts as an important foundation of your military can bring a lot of peace and stability…

Maybe you want to read up a bit on the Vietnam war and how the public was deceived; it isn’t just much “sending conscripts over to a overseas to die for some piece of dirt” - if conscripts see no purpose in fighting over that patch of land, maybe politicians shouldn’t either !?