I think generally I agree with you. Though I'd argue proving anything about morality is practically impossible. Let's take an example of something that was for

I think generally I agree with you. Though I'd argue proving anything about morality is practically impossible. Let's take an example of something that was for thousands of years across many cultures and to some degree is still seen as acceptable or morally justifiable behavior, slavery. While I personally believe it is reprehensible, I would be hard pressed to "prove" this in a way that doesn't rely on value judgements along the chain of reasoning. I can't prove or disprove that industrial scale exploitation of mammals is morally wrong. As a society we see this as morally acceptable, what if we are wrong?