A “fair fight” is a result off poor mission planning. If your goal is self defense parity you simply don’t understand either the problem or your chances of recovering from it. Notice that the boy apparently made his move at the first sign/sound of forced entry. If you are serious about your own safety/defense then you need to re-assess how much and where your defensive tools are with a view to making them OVERWHELMING———that’s what works.
Well, they DID call them “equalizers” back when the West was wilder. But gee can’t you get tongue in cheek. I want two big scary guns if the intruder has one.