I'm at a friend's place and the cat keeps bringing in dead (or half-dead) animals into the house. It's my understanding that cats think we are big, helpless kittens that don't know how to hunt. Hence, they think they are doing us a favour.
It seems like a few mice actually escaped and found refuge in some walls in the house, so these "presents" are actually more than just annoying (and smelly if the dead animal ends up behind the couch).
Well the information you are being provided with is very wrong.
Here in the UK they’re still classified as wild animals and many people let them out. They also work on farms and perform vermin deterrence. But they’re mostly pets and it will be a very very rare thing for someone to use a harness.
I can walk up my street and see one or two sat outside sunning themselves or watching the world pass by and many just want petting. But not usually when I have my four legged boy with me.