If the public rejects crypto, then it will not be able to build a blockchain in their lives. We know that technology is increasingly sophisticated and growing so that this should be done wisely for the future. Indeed, ordinary people are still difficult to accept crypto and they do not believe in their progress.
In theory, blockchain can be used without cryptocurrencies. many governments have been thinking about it for long. however, it will be a very complicated process, available only for IT specialists. Thus, cypto is needed.