Labor 2PP at last election, 52-48. That margin would be wiped out if 20% of Greens followed Lidia Thorpe and voted no.
LIke it or not, the Voice campaign has to be pitched at conservative voters who won't respond well to "Dutton is a hypocrite".
Show don't tell

@johnquiggin

I’d like some idea on expected tangible benefits and costs. There’s an argument that this may cost a lot and not achieve tangible improvements in outcomes. The codesign report is very fluffy on both expected outcomes and costs