The truth of the matter is: We don’t need central banks. Since 97% of the money supply is created by banks, the importance of central banks is far smaller than generally envisaged. Moreover, the kind of money that commercial banks create is not privileged at law. Legally, our money supply is simply private company credit, which can be created by any company, with or without banking license.
The dude obviously doesn't understand how modern banking system works. Banks create money on behalf of the Central bank. To better understand that idea, just imagine that there are no commercial banks in the neighborhood but only branches of a Central bank everywhere. Banks create money because 1) Central bank allows them to, 2) they are allowed to create only the Central bank money (dollars, euro, etc), and 3) Central bank backs up these banks if something bad happens to them. There was a time when banks were truly independent with no Central bank as we understand it today, and this didn't end well.