You’re uninformed. Cats co-evolved with humans to serve a job (pest control, in exchange for safety and the occasional bit of food). There have only been fully indoor cats for a few hundred years. Not all cats have to have a job, but some WANT one, just like dogs. We should let them.
My cat is angry with me if I don’t let him spend at least 12 hours a day roaming and catching bugs and mice. He has neighbor cat friends that he goes to see. Why would I deprive him of that?