I'm thoroughly in throw open the border camp (when vaccinated and safe to travel) so I might not be standard audience. Not so much seal the borders, as opposed to keep us safe and let us do whatever we want whenever we want it domestically, and I can see that point.
Unfortunately we are not the 1950's and can be self sufficient and barbed wire our shores, We are a global connected species now.
If the rest of the world (first and second world) travelling and enjoying themselves, little in way of death and oversea's media confirming this, plus said oversea's media making pariah out of us Aussies, there will be pressure to open.
Danger is both politicians early 2022 both state we will look at borders once more data come in, trouble is data will pile in by end of this year as to vaccine and opening safety.