Absence of basic sense appears to be a continuing failing for lots of people over the years right up to the present: what you're suggesting is that when Australia's population in 1915 was <5m the politicians of the day, instead of committing troops to help the Mother Country not only as patriotism but as "insurance" against who-knows-what-in-the-future, should have been isolationist, as was the USA until Germany started sinking American ships especially the liner Lusitania. And it was the might of the then young USA which helped bring WW! to an end. As it was also in WW2.
Had little Australia not involved itself in WW1, would the UK and/or the USA have involved themselves in WW2 in coming to Australia's aid?
Fast-forwarding to 2023, one could submit that Australia should not help in Ukraine and other hotspots and if China should continue its SW expansion claims what hypocrites would we be if we then put up our hands and asked for help. Is this what you're proposing?
