At the moment, if someone wants to store information on a blockchain using proof of work, proof of stake etc., arguably the best implementation that humans have invented is Ethereum (Bitcoin is arguably the best for slow stable $ preservation, think what you want..). The gas price of Ethereum is not fixed, but at the moment far too expensive to store large images. The purpose of Crypto technology is not specifically to store images, that will probably come in the future. It does work to store financial transactions, and to perform smart contracts that don't require large amounts of data. NFTs don't have to be used for images. They could be used for tickets, proof of membership, to run small algorithms etc. The value is always going to be subjective. But saying there is something 'wrong' I don't think is correct. There is definitely something wrong with many people's intentions obviously, but that is sociology, not technology.