That's a good thing, the statement should of had an "if" caveat. The point being we open up when one, the vaccine shows its doing its thing, which appears on track, and two, when sufficient amounts of population have been immunised, which has not occurred in Australia yet. At any point before point 2 occurs the virus could mutate and become more/less virulent, more/less deadly, circumvent the vaccine etc. Why rush to open the borders when you can wait it out in comfort and watch what happens.
I also think you should manage your alcohol intake before posting as that second post makes no sense to rebuff my comment on statistics, amounts that impair your ability to think clearly could lead to heart disease and or cancer.