> hy? Because it actually renders everything, anywhere, ultimately arbitrary
They are arbitrary though. You don’t like it because it forces you to admit everything you consider objective about the universe is little more than your cultural meta narrative.
Whether I am breathing or not really is arbitrary to you, until our realities interact. Now that you're reading this you've suddenly lost the option of saying I'm not in the model of the world your brain has formed.
However exactly what I am in your own mind, that's not for me to say. At least, that's what your mind is saying.
