Unix was originally a networked system that many terminals would connect to. Being able to actually reach the machine meant that you had authority.
It's the same today. If someone has physical access, the system is so screwed that you can just give total privileges anyways.
She's overpowered but despite that she never feels unfair. I haven't played as her yet, but as a DPS player I like playing with and against her.
Gameplay design wise I think they really hit it. I want all other heroes to be as powerful yet as fair.
Visually, she gives off strong Paladins Furia vibes. Thematically kinda similar too.
Her ult is completely different from all other ults in the game.