it's illegal to defend yourself:

Sydney man Blake Davis jailed for samurai sword killing of rapper Jett McKee
By Jamie McKinnell
Posted 5 hours ago, updated 2hhours ago
https://www.abc.net.au/news/2021-03-16/ ... h/13251840
Sydney actor Blake Davis has been sentenced to five years and three months for the samurai sword killing of a man who attacked him during a botched home invasion.
Key points:
Blake Davis received a non-parole period of two years and nine months
In sentencing, the judge accepted it was a "horrifying experience" for Davis
His partner Hannah Quinn will be sentenced as an accessory after the fact to manslaughter next month
The 31-year-old was last year cleared of murder but found guilty of manslaughter by a jury over the August 2018 death of rapper Jett McKee.
Armed with knuckle dusters and a replica gun, McKee punched Davis and threatened his girlfriend Hannah Quinn in their inner-city granny flat at Forest Lodge.
The court heard Quinn chased McKee down the street after he snatched her bag and when her boyfriend caught up to them, he cracked McKee's skull with the sword.
Justice Natalie Adams sentenced Davis to a non-parole period of two years and nine months behind bars.
"I am left with no doubt that the lives of both the McKee family and the Davis family have been shattered forever as a result of the events that occurred on Hereford Street, Forest Lodge," she said.
Davis's eyes welled up as he learned his fate, while Quinn looked on anxiously from the public gallery with relatives.