Exactly. I used to only carry my Glock 33 off duty. 10 rounds total. No spare mags. One day after work on my way home I still had my portable radio on. Night shift was all tied up and there was a call of a car driving up and down a road with four people in it and someone pointing a gun at people as they drove past. Lo and behold the car is right there. I call out that I have it and will stop it and to send me someone.Most cops want the smallest, lightest, and easiest to carry gun there is off duty UNTIL they are attacked and wished they brought their S&W 500 instead.
So like an idiot, I drive at the car and block the road. They stop in front of me and I hold them at gunpoint after identifying myself. So I have four guys in a car. Unknown weapons. Armed with only my 33 waiting for backup. Thankfully they gave up and surrendered without doing anything stupid.
After that I switched to my 32. Years later I now carry the 32 and 33 off duty.