Speaking from experience, Ive had someone come into my home while my GF at the time and I were sitting on the couch.
I keep a shotgun next to my couch, but as someone mentioned it is all in the mindset of the individual with a weapon.
There are those who go out and look for trouble just to flex their guns. There are others that would have pulled a gun on said intruder.
As for me I assessed the situation, quickly looked over said individual, looked for any signs of a threat then decided to NOT aim and threaten.
Was my gun in reach in case of an attack? yes.
I could have put one in his chest faster than he couldve got to me. Ive been shooting for a long time.
I deescalated, asked him to leave without brandishing.
I wouldve felt terrible for killing someone who is likely in such a shitty situation in life that he turned to thievery, but if eminent danger arises to me or my loved ones, I like the feeling of knowing I could stop it then and there.
Like a condom, Id rather have it and not need it, than need it and not have it. (edited)