Asklemmy

Not that I was ever interested in being military, but I was at a lunch with two older lifelong army retirees. They kept talking about how military service broke their bodies and politicians won't cover their medical costs. These injuries were independent of any combat: It's just expected that you sell every part of yourself when you sign up.

Who wants to be 45 years old with a limp, be unable to hear a quiet conversation, and have horrible back problems?

Ask them to do so themselves, voluntarily.

If they refuse, the argument stands.

If they accept, you won't convince this person.

Let's start with the second part of your question? How do you make someone understand that invading another country is not a good thing?

You put the someone in a re-education camp

You start by giving up on making them understand.

Issue is that "old people" had to spend their time in the army, sometimes even in a foreign land (Good old time of the colonial war), so kids these day feel so privileged

I mean, we can blame the boomer for a lot of thing, but in the 60's and sometimes 70's (In many countries) young men had no option but do a military service which way involved going to fight to keep the colonies.

War is horrific. If we deem a military is necessary to a peaceful society to protect from threats both domestic and foreign, then we should have a draft of ALL able adults, not just the poor and underprivileged. Rich folks, political folks, and otherwise connected individuals should be subject to be put on the front lines right next to the rest of us. What that means is we might rethink, as a nation, any military action. An all volunteer military would be the next most preferable one that is paid equal or greater to the national average income with full lifetime benefits including healthcare for the whole body including mind, teeth, eyes, etc., pension, free education including masters and doctorate level education, housing, as well as meeting other basic needs of life.

Anything less than that should be unacceptable.

I didn't think it's wrong universally, for example, Ukraines current offensive into Russia.

You hold up your draft card and burn it.