[fckgnad]

>I can't imagine why someone would create a vault dependent on electricity.

Same reason why people create doorknobs and car locks that depend on electricity. Also this: https://www.protoolreviews.com/lockdown-logic-vault-door-cre...

That being said I'm sure it's a bug. I'm sure whomever made this security thing accounted for power outages. But I'm sure some loop hole appears during that power outage that the builders didn't anticipate.

Also yes, obviously it's some security thing that has to do with power not necessarily a vault door. That was just an example.