Thats true, we still need banks. They control money, which isnt the best way, but they also protect it. Or protect owners that they dont lose it. If you ignore the financial crisis of 2008-2009, when many people lost their money. But we need their services and they keep the economy running.
They are still the ones being the most used services out there by anybody, and even though they are not perfect - BTC won't outright become the full-on transition option for them in the future, and we must always understand this.