Earlier quoted context omitted.
If morals aren't relative, which ones are correct? To me, moral relativism means that I understand other people have different morals than mine and I have to respect that. It's not some excuse to toss morals out the window.
If Special Relativity and Quantum Mechanics are incompatible with respect to gravity, which one is correct? The fact that we don't know something does not then imply that that the actual truth is subjective. The less you know the more humble you need to be, but different views do not always justify respect. To use my previous analogy: If a random person shows up to a physicist claiming to have invented anti-gravity,…
I'm really not following how this relates to my original comment either, I meant your idea of "fairness" depends on personal values. The fact that people have different ideas of what's fair is conclusive proof.