You are so selfish, going to the effort of calculating the odds for yourself, a 45 year old.
The point is, do you have any generosity in you? Millions of people in Aus have rolled up their sleeves, not because they were selfish enough to work out it was best for themSELVES, but because they worked it out that it was best for ALL. "All" might include your parents (I hope you still have them, and I guess they'd be in their 70s), and your uncles and aunts, perhaps even a grandparent or two.
Not to mention the health workers of course who are real heroes.
Society in Australia has really risen to the occasion - the generosity of spirit in accepting the advice, taking a finite but minute risk, in order to protect self and others has been exemplary. Australia is the Numero Uno of all countries in the world in these times. You watch where the final score lands, it will be awesome.
Thankfully, you hold minority views. I wish you and your extended family all the best, and Good Luck.