More than justified?

So this woman feels “more than justified”  about shooting at her husband after he refused to give her any of their tax return money.

So yeah, she’s pretty dumb.  But here’s the real question.  What the hell does “more than justified” mean anyway?  People say it a lot, but I’ve not yet figured out what it really means.  Being or feeling justified is kind of a binary thing.  Either you are, or you aren’t.  If you say “more than justified” does that mean you feel super justified?  Like you were doing the world a favor or something?

Is that what she’s saying?  She did the rest of us a favor by shooting at her husband?  Hrm.  Maybe if I got a cut of that tax money, I’d feel like she was “more than justified.”