Earlier quoted context omitted.
It is understandable pure-logic thinking until you're the one to be made battlefield-relevant. And if you look at Russia your logic does fail on that example - no amount of human losses affect Russia's behavior in the current war as they are sure that Ukraine will run out of soldiers before Russia does. So, from Russia's POV the faster the grinder the sooner their victory.
No. Here in Sweden we instituted mandatory military service we did so because we wanted to ensure that there was no military class that if they decide to can take over. We knew the cost, and the cost is worth it. In normal times the cost is simply to do ones mandatory military service. This protects against coups, ensures your power in society and prevents groups of officers and soldiers etc. from taking over.
Meanwhile Spain suffered an attempted coup in 1981 [0] while mandatory military service was still in place [1]. The conscripts did not play a role in protecting democracy.
[0] https://en.m.wikipedia.org/wiki/1981_Spanish_coup_attempt
[1] https://en.m.wikipedia.org/wiki/Military_Service_(Spain)