Can't say that the author is wrong. Most people in this world has no clue how the current fiat money works but yet they still use it fine.

Just like the most of the internet users don't  know how TCP/IP/HTTP works but they can still use it. They don't even need to know about these stuffs if they want to access the internet. But they need to know some stuffs about the internet like security, privacy and safety.

Thats the same thing for bitcoins. They  need to know how to use it but also how to store securely, how to do a transaction that is send and receive from a wallet. That's it. No more techy stuffs needed.