Comment by splix

This real person doesn't really have any significant advantage.

From my personal experience, when you have a problem the only thing they can do is to call someone and talk on your behalf, and you can do the same from home, btw. The only advantage the banker has in this case is that they have those numbers on fast dial. But keep in mind that even if you called the right department nothing can be resolved immediately and all the following communications are by paper mail, so it takes months to recover your funds.