Look at it this way. I am clean. There are no drugs, illegal weapons, other BS in my house.
My street name starts with a K. The name can also be spelled with a C. The C name is in a really bad part of town. I live in a so-so neighborhood (my street is OK, but it is not too far from the local meth haven).
MethHead home invasions are somewhat common here. I keep a loaded 1911 in the nightstand. Wife has a 38 Spcl. If my door gets kicked down in the middle of the night, if my wife is in bed with me, lead will be heading that way shortly. (no kids or roomates, or relatives with keys)
Hypothetical situation. SWAT gets a no-knock from the court. Typo on the warrant gives my address (K instead of C. I get mail for them at least once a week). They show up, no lights, just form up around the corner, and yell police, and kick in the door. My coyote will go bat**** about 2 seconds before they kick the door in. The Lab may wake up. Even if they yell "Police" and kick, I won't hear "police" all I will hear is the 'yote going nuts, and the door being kicked in.
Men in black, yelling with guns are now in my house. I do not know they are police. The SA gyros are still spinning up here (remember, I was hypothetically asleep).
Fight or flight part of brain is only part up to speed.
Men with guns = threat
Exit Blocked/Family Trapped = no flight
That leaves fight and will likely end up with me and a cop being shot. Remember, I do not know they are cops. (and what is to prevent enterprising methheads from yelling "POLICE" when they kick down the door)
Nevermind that kicking down doors and middle of the night raids are why my family left Latvia.