Indiana Jones
Wolverine
I can't fire a rifle with one hand. Inside a house, cqb is tough doing it alone. I need to be able to use my left hand to do things, open doors, grab things, support myself for balance, etc...
Carry a safe and empty ar around with you in the house for practice. You'll see just how cumbersome it really is.
But nobody without training needs to be doing that. Hunker down behind a locked door, 911 on the line, weapon pointed at the door. Only come out when you are certain the good guys have arrived and instructed you to come out. With your background you could move around but some recreational shooter/average Joe is gonna get themselves ventilated if they try to play Splinter Cell: The Home Game.