If I collect stamps, it's fun to show off your stamp collection because you have those stamps. It's different if everyone can also have all of those stamps, and the hobby is reduced down to "I have these stamps and also my name is on the blockchain next to each of them". There's no physical scarcity for the stamps, there's scarcity for your name being listed as a buyer in a ledger. Call me old fashioned, but that seems to suck the fun out of it.