You can describe it any way you want. It doesn't change the fact that "value" is not something which is easily defined which again the art scene is a good example but also stamps, coins, stickers, physical Pokemon cards and so on.

You don't build an economy on Pokemon cards!

You build an economy of all sorts of things including pokemon cards. The economy is already there. Not sure what you are trying to get at other than you don't believe in the blockchain which is fine, you don't have to.

Just don't claim that you are somehow making an arugment against it cause you aren't for reasons already outlined.

There is nothing new about the types of businesses which can be created on top of the blockchain other than that they can be digital. But as a value system they are as solid as physical items.