Races of people exist in our society. Observing that, or mentioning race in any contents, isn't racism. I totally agree though -- all Australians should be treated equally. Unfortunately, since colonisation, Indigenous people have not been treated as equal to the settlers. In fact, they've been treated like shit. The system they live under is incentivised to treat them like shit, because it gives other people money and power and land. Crafting special solutions for them, based on their race in a racist system, their culture, their individual needs -- that's the only effective way to help. Every other way is blind. This goes for any group of people. We can give separate, necessary privileges to both Indigenous and Chinese people. It's not a zero sum game.

That's not the definition of racism.

Giving people in a wheelchair a ramp onto the train is not ableism.

Giving children a booster seat in a car is not ageism.

Bigtory is about discriminating against people based on an attribute. So you'd need to argue that the rest of Australia is having their government representation taken away by the voice.

The entire point of the voice is try and treat people equally by addressing the intergenerational issues caused by systemic racism.