1. In an ideal liberal democracy that's been set up with agreement from all parties yes. But the aboriginals didn't even get a vote on being colonised, nevermind Federation. They've essentially been under occupation for more than 200 years. The Voice is meant as a first step in resolving that conflict so we can move forward as a nation. Voice, Truth, Treaty. Even the racist yanks made treaties with their natives. Can we not even live up to that low bar?
2. I personally don't think the Voice will be a permanent feature but I also don't think me or my grandchildren will be around to see it abolished. There is multigenerational trauma that needs to be acknowledged and healed. That's the Truth and Treaty bit btw. The Voice is meant to make sure the government of the day doesn't forget those two things.
3. Not going to entertain slippery slopes. Other minorities consented to participate in the liberal democracy we established. See point 1 above.
4. See point made by @Ilandar@aussie.zone about 200 years of oppression and attempted genocide.
5. The Voice will be permanent that can't be abolished like all the previous groups. It's still purely advisory so parliament could absolutely ignore it but they have to consider the optics of the thing. Because now the Voice will be visible. Hand to heart, how many people could name all the previous aboriginal bodies before this debate? I know I couldn't.
6. The point is to not be purely performatory. Just adding a line in the Constitutions then patting ourselves on the back and calling it a job well done isn't enough. So many organisations already do that today and it's become nothing more than an empty ritual now. Do you notice all the "original custodian acknowledgements" uttered at the opening of every function? Adding a line to the Constitution would be just that.
7. The point is to have a symbol that is visible. To move forward to Truth and Treaty. I think that's an important step to take to right the wrongs of the past so we can move forward together.
8. See point from @Ilandar@aussie.zone about them being here first. Also see point 1 about not really having a choice of being part of our modern nation.

I'm not even aboriginal. My ancestors came from China during the gold rush. There are things I'd like to see redressed too but I haven't had it as bad. They're first in line, so to speak.