Australian voting isn’t actually compulsory; attendance at the polling booth (where you can abstain if desired) is encouraged by a token fine that is easily evaded with minimal effort. It’s designed to be just enough that not-voting is more hassle than voting.
I have major issues with compulsory service of any kind. I was a messy kid; I would not have survived an early-adult national service system of the sort found in Sweden/Israel/etc.