I never saw any arguments against the Voice that weren’t either simplistic ideology (“it’s racist to have an advisory body for indigenous people!”) or outright lies and conspiracy theories. Claiming that it wouldn’t have gone far enough isn’t a good argument to do nothing instead. Does anyone really think that a treaty is more likely now than if we had voted yes?
Not to mention that the bar for a referendum to pass is very high. For the non-Australians, you need not only a majority of voters nationally to vote yes, but also a majority of states to vote yes (the so-called “double majority”). Only 8 of the last 44 referendums before now have passed and partisan referendums have never passed, so this one was doomed the minute Dutton decided to play politics with it.