Only really true in some countries. In the Netherlands you can extremely easily and instantly transfer money from one account to another (even at another bank) for free, using simply their IBAN. There's also apps for convenient stuff like requesting a small payment by generating a link or splitting the restaurant bill, etc. Again all working directly with your real bank account.

In France you need to physically go to your bank's branch, prove your identity via 4 different pieces of ID, write a physical check, sacrifice a goat to the overlords, and then the transfer will get there in a couple of weeks.