Except some of us could not “serve”... it isn’t just a willingness or avoidance issue...
And while I certainly understand your position on able-bodied men serving - even in those generations/wars of the past - while many did volunteer - the lack of a draft/compulsory service for our wars is a relatively new concept.
I don’t know what your personal circumstances are - but my younger brother was mangled in a motorcycle accident and wasn’t able to join the service when I did. Which, in his case was fine because he is/was one of people who would have been very bad at it.
I am probably an idealist because I believe that a draft shouldn’t be necessary - men should consider it part of their citizenship to join a service- particularly in wartime - and not have to compelled.
But of course, I know better. I saw first hand that life just went happily along without us. It was a very difficult thing to have been through what we went through and see so many guys our age just enjoying day to day life without a care.