literally not being a choice

There is always a choice.

difference would be if there was 3 years mandatory service or whatever for every person, which I think they do there?

I would simply not be Israeli

This quote from The Myth of Sisyphus by Albert Camus is interesting to think about in this context.

"All systems of mortality are based on the idea that an action has consequences that legitimize or cancel it. A mind imbued with the absurd merely judges that those consequences must be considered calmly. It is ready to pay up. In other words, there may be responsible persons, but there are no guilty ones, in its opinion. At very most, such a mind will consent to use past experience as a basis for its future actions."