Please see my other reply. There's no shortage of shocking accounts, you only need to want to find them.
I'm surprised that you perceived it as insulting. Your comment sounded like someone demoralised and self-loathing based on your race and heritage; it's a reminder to be conscious of attempts to manipulate your identity in this way, and suspicious of the perpetrators.
My argument is that few people are aware of how barbaric many aspects of Aboriginal culture were. This was not some flawless society to be fawned over and emulated, as modern woke scholars might have you believe, this was a culture rife with violence, rape, torture and cannibalism.
Only last week I read a primary account from a settler describing an Aboriginal practice where a stick would be tipped with a various makeshift hooks, attached with sap and string. A young girl from the tribe would be selected and restrained, and the stick used to penetrate her and render injuries to the point of sterilisation. She would then be used by the tribe's men at will, notably in ceremonies where she would be gang-raped, with the subsequent blood and semen collected to be consumed by the frail and weak to boost their vitality.
And so I put the question to you: If you had the means and will to rescue a child from this fate, by taking her away to be homed and schooled in a facility for this purpose, would you still - in all your cultured wisdom - instead choose to sit idly by and "let nature take its course"?