It would have enshrined a specific racial carve-out for aboriginal peoples. It's a similar mindset to "separate but equal." Of course, there's no such thing. It's never equal. One side will get preference. In this case, the aboriginals would have been given preference. Regardless of which side "won," the net effect of separating people and creating sub-identities would have been division and resentment. Whichever side felt they were getting the raw end of the deal would always be upset and rightfully so. It is far better for them to have chosen to simply say "no, we're all Australians, not hyphenated ones." We live by the same rules. That's true equality.

The Left always advances by dividing and pitting the two sides of whatever dichotomy it creates against each other: rich vs poor, black vs white, men vs women, straight vs gay, etc. It's toxic and never creates a stronger nation. It only ever leads to division, and in the worst cases, leads to such terrible resentment that they slaughter each other.