Story time..
A few months back I was supposed to work a midshift and earlier that evening a took some melatonin to help me fall asleep and ended up over-sleeping. Because of the nature of my job, when I didn't show up the police were called to come to my house and check on me.
I never heard them knock or anything, what if they had decided to do a "welfare check" on me and broke in. I own 2 guns, what if I came out with one to protect myself from an intruder?
Well, you'd be dead and your killer would back to work in less than a week.