No, It's Not All Relative

All opinions are not created equal

A trend I've noticed is the increasing prevalence of relativism. I think I understand (at least, in part) why that is. We're living in a(n ostensibly) "free" society, where everyone is entitled to their opinion.

Yes, everyone is entitled to their opinion, but all opinions are not created equal.

To use a silly example: If I have an opinion that grass is purple, I can certainly say that's what I believe, but it's objectively false. An environmental scientist can explain to me the error in my argument, and I can ignore the evidence they provide, and tell them they're entitled to their opinion.

But that would make me an ass. Alternatively, if I respect the knowledge and expertise of the scientist, I can yield to their many years of study, and learn something from them.

Being entitled to an opinion does not mean what is factually true can be determined by said opinion. Opinions can be WRONG. There are significant differences between personal preference, belief, perspective, etc. and that which is based on empirical evidence. Don't confuse the two.