I think I'm still missing the gap: hats have value and art has value. Collectors collect certain hats and certain art in a way that is disconnected from their underlying value; it seems like grand-op was legitimate to mention art then, in reference to the common phenomenon of art collection?
Look I'm sure you mean well but this feigned-ignorance-leading-question schtick is literally thousands of years old and is basically just annoying. Try making an argument instead of baiting someone else into a bad one. Anyone past age 25 has long since made the realization that you can Socrates the distinction between any two categories all day. Wittgenstein & family resemblances happened, get with the last century of philosophical discourse please.