Veganism

[Paleophyte]

You don't have the 'progress' or 'agreement' that your argument requires. Progress and agreement implicitly require the very moral absolutes that you're trying to demonstrate, so congrats on simply defining your position into existence.

The point is either agreement is an indicator of moral progress or it isn't. If you're saying that it isn't then you also, by the same logic, can't say that moral disagreement is a sign of subjectivity. I'm not saying that there is necessarily morally objective progress, that would be circular. I'm saying that agreement either is an indicator of moral objectivity and progress or it isn't. If it isn't then by the same logic disagreement isn't an indicator of moral subjectivity. You can't have it both ways.

I think that you'll find that I can. Observe whilst I fetch the town drunk and place them on a spinning merry-go-round with a bow and arrow. From the blind scatter of the arrows, we will be able to infer that whoever fired them was really, really bad at aiming, if there was a target at all. We have disagreement between the position of the arrows and we do not need to know where the target was or wasn't to establish that somebody was clearly very bad at hitting it. That's the basis of my argument. I'm not sure why you're having so much trouble with that. All the rest falls from that.

Agreement might be an indicator of 'moral progress', but you don't have that, so the point is moot.