Banks don't protect you from volatility in the real life as well. E.g.: You live in the USA and you want to have an account in EUR currency. The bank lets you open the account, helps you exchange your USD to EUR, but after the bank won't protect you from the volatility of EUR, that means you won't be sure that your EUR will worth the same amount of USD compared to the time when you originally had it exchanged. This is not a problem in real life, why should it be a problem in connection with bitcoin? A lot of peole use the volatility of different currencies and uses it to make money by exchanging the currencies at the proper time.
You miss two very important points.1 ~ I pointed the question of how banks would prevent people from being exposed to the volatility at the user I quoted. I didn't say anything about banks to offer protection against volatility.
2 ~ Banks/governments don't consider Bitcoin to be a currency that sits on the same level as fiat currencies. So your example/comparison is not valid.
