There's one, and only one way for a firearm to be of any value to you as a defensive weapon, and that's if it's loaded, with your being able to discharge it with the flick of the safety and the pulling of the trigger. Anything else will very well get you killed.
Look at it this way....when you deer hunt, do you wait until you see the deer you want to shoot before you load the gun? Do you keep your gun on your lap and the ammo in your pack or attached to the tree somewhere? Hell no! And this is in a circumstance where the deer is NOT trying to do you any harm or kill you!
If you have safety concerns concerning kids I more than understand that, and the ideal thing to me would be able to have the loaded firearm in a safe or other place where you can get to it with the touch or your hand, without having to think of combinations or loading functions.
And if someone was actually in MY home, on my turf, the only warning they would get from me is when I had them dead to rights and in my sights, and it would be issued ONE time, FREEZE, DROP IT OR YOUR DEAD. Up until that time, the last thing I'd want to do is to give away my presence or location. I'm on my ground, and that's a HUGE advantage. Why give that up by racking slides, sending clips home, or some other form of sabre rattling? At that point, they would only be a trigger touch less safety from eternity. My entire being and psyche at that point would have to be focused 1000% on what he, and then I would be doing in the next nano-second, NOT on loading or finding my weapon. We're talking equipment prep and muscle memory here that makes a bowhunting situation seem like a walk in the park.
