Earlier quoted context omitted.
What does it mean to own something? It what sense does a Moon share give you any ownership over any part of the moon? If someone else goes up to the Moon and builds a lunar base on "your" piece of the Moon, does your Moon share give you any way to stop them? Can you sue them in any court? Does it prevent anyone in any way from doing whatever they want with that piece of the Moon? No, it doesn't. Contrast with a token…
The blockchain equates to the Moon Shares company. Outside of the company/blockchain, the ownership means nothing.
Neither of those are necessary for the blockchain because nobody can assert ownership of the blockchain tokens without the private keys to your wallet.