Ah! It isn't fine!
A masochist under that rule would be in his rights whipping you.
Fully respecting the "do not do to other what you do not want to be done to you".
Jokes aside, who cares from where my morality comes from, actually?
I might care, but I don't.
Others shouldn't care, really, as I don't care about theirs.
It's quarks bumping against each other?
Genetic?
Education?
Fox News?
Meh, it's still all the effect of quarks bumping against each other, after all.
What is the whole discussion's point?
Nothing definitive, nothing that can be measured or tested.
More or less like utilitarianism.
Rivers of words and eventually: "Meh, everyone remains of their own opinion, but maybe the dude in charge thought it was good to abuse his power. So the forced bride was wrong to rebel."
No, wait, this outcome is measurable. And for me is bad.
They agreed those truths are self evident.
Else they wouldn't even even to state or write it down.
Even more because those points were not so "self-evident" previously.
It removes completely the layers.
It's: "Rights and wrongs? I don't even care what they are. We define those by ourselves, if we can agree with them. Without needing to think they come from somewhere else."
Treatment and care, I can agree.
But to give treatment and care, you clearly agree they have done wrongs. Even if in good faith, in their nut minds.
I insist: asking them is the easier way to know, without the need to be empiric.
And it is certainly the only way to be sure.
Well, rigging the vote of the ones you wish to abuse, might be a bit more complicated.
It might even be interesting, but since utilitarianism is "maximize utility" and "utility" cannot be measured or computed, but it's based on what the same person thinks it is right, it seems to sum up to: "it's moral what you think it is."
Not only I don't see it working as a system to talk about the morality (or how you prefer to call it) of societies, but it appears to go under heavy circular logic even you try to use it for introspection.
(And even if it was of any use for introspection, cool, money spared away from psychologists, but introspection is a thing a debate on "X is justified to do Y?" is another)