+1 to being happy to see Australian gov getting a kick in the teeth but that is a different topic.
Seems they are presently governed by the OVP (nominally a right wing party, though right-left is probably a poor framing on this site and as concerns Austria) and greens (which seem to have all kinds of personal rights at their heart) in coalition. Unless you are going to reckon some kind of massive sea change...
Which is enforced at the point of a gun (tried running away from jail or fines lately?). Minor abstraction.
Again you being the one to make the radical claim (that being we should forcibly inject people of otherwise sound mind against their will) get to be the one to back it up on it being such an overwhelming necessity as to justify bypassing what is otherwise a fairly fundamentally held right.
I would probably completely agree on statistically (absolutism and science you seem to want to champion do not go hand in hand but for the sake of discussion that can be overlooked) there is going to be someone with a shitty immune system (even more so as mere age works for this it seems) in some kind of non abstract circles, and transmission rates is fairly sound maths even without that. Diseases tend to have transmission rates (higher than many but ultimately fairly low as these things go in this case) and deadliness factors (higher than some but still far from apocalyptic, even if some did like to do the sky is falling routine) that go together for the basic metric of their concern levels (100% fatal but only contracted from prolonged sexual contact with a rare rock would probably be hard to justify a forced vaccination for, even assuming someone thought it sexy enough to make a vaccine for* it). Evolution/mutation is also good maths
fun simple maths covered in that one.
*this is also far from the first coronavirus in modern times to have serious fun around the place. Are those that denied funding the last few goes around now negligent to the point you seem to want to hold the unvaccinated to?