You live in Finland.
We have military service here because we're a small country with a large and aggressive neighbour that not only has attacked us within living memory, but is currently demonstrating what it does to neighbouring countries that it thinks it can get away with attacking.
If military service makes sense anywhere...
Just make sure to add comments like
//Magic, do not touch
To make sure no-one accidentally breaks the spell.
If you're going to memorise a deck of cards, you're better off learning something like the Mnemonica Stack as you can use it as the basis for a whole load of card tricks.
Secure connection cannot thou obtain
for SSL hath failed and err' gain'd.
What you're describing is a perfect thermal insulator.
What does it feel like when you're wrapped in blankets? You feel warm, despite the blankets generating no heat of their own. They do this by insulating you from the outside temperature.
It would feel like being wrapped in a warm blanket, and if you were fully submerged, you'd end up overheating as we're constantly generating heat that we need to get rid of.
This is like saying:
No-one wants mandatory military service, but it's necessary for the sake of society as a whole. Maybe one day it won't be, but clearly that's just how things are now.
As for choice, you do have a choice and you know it. Civilian service is a thing here.