Yes but you are from a "soft" country (I mean no disrespect, it is wonderful here, I can't believe how green and soft and small and tidy it is! Someone once told me it was a long drive from London to York!).
Can you understand how many there are? Can you understand the sheer scope and cost of the hunts? Can you understand the distances you need to travel to even find them?
There is a problem in Australia with tourists driving into the desert (even the fringes) without sufficient supplies and breaking down on the road. They then get out of the car thinking they can walk to get help. They almost always die. There is a British idiot who was just released from hospital after being lost in the Blue Mountains for two weeks. You can take a wrong turning from a suburb in the mountains and be totally disoriented and get yourself killed, from a suburb.
You cannot apply UK (or European) farming/humane standards to a completely different ecosystem/culture. THAT is what got us into this mess in the first place. I don't particularly like the tigers in Asia being killed, but I understand why someone would choose their village and the humans over the tigers, the same for elephants. I don't like it but I can see why they kill them.
Same with the brumbies, most Australians love the wild horses, they are tied up deeply with our history and what makes us "us". But they are a larged hoofed animal which are running riot and need to be culled. You have to put your personal feelings about animals aside and do what needs to be done sometimes.
Anyway I am off to enjoy some of your gentle sunshine in a lovely green park.