That said, are bad government policies worse than the murder of civilians? I'll let you guess which one is more likely to make me go out and protest. Of course I'll ridicule people who call Australia an authoritarian state over the suboptimal handling of a public health problem. First of all because I know what an authoritarian state actually looks like, and second because having temporary movement restrictions is only a mild inconvenience for most people. Also, your government actually wants you out of your house working and spending money, and they would much rather not have lockdowns at all than lose votes over this. I never thought I'd see the day where I talk about an Australian politician in a non-critical way, but here we are.
> foreign citizens are forbidden from leaving the country
Only permanent residents are not allowed to leave without a permit, as per the home affairs page. But to address your point, I can absolutely promise you that people did not go on protests for the sake of foreigners that couldn't leave Australia.