The most valuable part of Bitcoin is being able to carry a fortune unafraid of theft either from a petty criminal or an employee of the government. Like weapons a very powerful technology that escaped Pandora’s box.
Traditionally, theft occurs with a sharp object at your neck. I don't think bitcoin protects against that. Not to mention that more mundane theft/government seizure/etc has already happened.
While there are no absolutes (but this one) there are no other way to, by remembering 12 words, carry millions with you. My point is simply that this application makes it valuable - regardless of any value judgement one may wish to make
A bank account is 10-12 digits... there's no new things going on there.
How would you gain access to the account itself just by knowing the account number?
I'm sorry, but are you really suggesting that millions of dollars worth of Bitcoin has not been lost to theft or seized by the government since its inception?