Ah, 'race', always dangerous ground to take the discussion to.
The constitutional change wasn't about 'race'. It was about giving a group of people with a similar context an irrevocable minimum base of contact for the wider community to engage with, and build upon.
I don't know that calling all aboriginal australians a single race is well thought out. I defer to 'nations'. The important distinctions between people, especially where policy decisions are concerned, are their contextual groupings, not ambiguous 'racial' groups. This is demonstrated in no better place than the population of Australia, we are many races, and they aren't what defines an 'Australian'.
To say one group in a society, who is identified as having particular impediments to their prosperity, getting particular attention is anti-equality means you misunderstand the point of the Australian, and Western, model of social welfare states. Instead of demanding equality for all, which has been tried and failed through many different types of governance structures its more practical to demand minimum standards for all. And thats really what we attempt to do in Australia, we equalise to a minimum standard. If you want more, go for gold.
Your comment reflects a confusion about the 'apples to apples' comparison, (say white to black) but the focus on race is the comments problem. So far as you can ever distinguish a specific 'race'.
The real 'apples to apples' comparison is with other contextual groupings of people in Australian society who do, or do not get much attention from the government. These groupings are diverse and overlapping they include, disabled people, the oil and gas industry, farmers, immigrants, Tasmanians, retail workers, retailers, the Swedish diaspora. These are all groups of people based on all sorts of significant contextual and cultural, geographical characteristics that aren't based on the ambiguous term race.
Read the calma langton report, and you'll see their approach to a Voice representative body never treated the Aboriginal people of Australia as a single entity. They have a plan for a broad spectrum of geographic and nation based representation.