ZeroState's own blockchain is necessary for the trust destribution of resources and payment for emotions. The main purpose of creating the own blockchain system is to make the system as transparent as possible and at the same time to reduce the cost of maintenance and operation of the application...
Well, do not need to have own blockchain. Enough the blockchain of the ethereum.
Each state costs the tokens and it will be necessary to transfer the tokens for each state. It is very expensive to pay the commision in ETH for each state. It it will be own blockchain the costs will be much cheaper. ZeroState will not depend from the Ethereum blockchain and pay commissions in ETH.
Nobody wants to pay extra money.