The problem is that most people don't want to change banks. If changing your bank to get a better savings rate took 15 minutes and had no other consequences, banks would be updating their rates by the second to beat one another. But it doesn't. If your mortgage, credit cards, car loan, etc, are all with the same bank then switching your bank account only just to get 0.1% higher interest is a huge hassle for little be…
Many people in the US have no problem opening and using multiple credit cards, so having multiple bank accounts shouldn't be too difficult.