You're missing the fact that it enabled purely online/digital money people will actually use. You could build an online currency with a database much more easily than blockchain but people won't use it because it relies on a central authority to maintain the database and not enough people will trust that central authority not to misuse their power. It was tried a bunch of times in the past and never worked. Fundament…
"You could build an online currency with a database much more easily than blockchain but people won't use it because it relies on a central authority to maintain the database and not enough people will trust that central authority not to misuse their power." Credit cards run 100% of online transactions and do a fantastic, quick, and cheap job of it. Crypto isn't creating something wholly new, it is attempting to compete with a network that charges 1-2% fees, works in seconds, and handles 1 BILLION transactions a day. With BTC you can't predict the fees or the transaction time and the network handles ~40k transactions a day, at extreme cost. Crypto currencies get more inefficient as more nodes come online (hence the proliferation of "side-chains" for games that need to actually, you know, make a non trivial number of transactions per second) and so they fundamentally break at scale. And don't try to spout some line about Proof of Stake, Ethereum will continue to push back the migration until the heat death of the universe.
Now you will probably respond that credit cards use existing currencies and the fundamental shift here is that this is an "online currency" vs "online payments". To the average person this is a distinction without a difference. Really this is fundamentally political, an (openly stated!) war on the Dollar, the Euro, the Yen, etc and the associated governments by anarcho capitalist Libertarians who want to trade bureaucratic government services with profit-driven corporate services