Male Cats are territorial. I've watched the semi-wild ones around here, Suburbs, for decades. One dies and a new one moves into its territory. I'm watching two lately that are contesting my back yard/Garden. Of course, my three Terriers are actually the masters there. If they can catch it, it is dead. Cats have their place, Rodent control. My Walnut tree drops a cubic yard of nuts most years, my yard is a Rodent smorgasbord.
I've shot a few, those that trespass into a local bird refuge, those that wander more than a quarter of a mile from home (legal here): I've put a few down that were obviously seriously sick.
The thing about semi-wild Cats is they are vectors for some nasty parasites and they crap in the kids sandbox and/or infect the Dogs (many dogs consider Cat crap a delicacy

).
Echinococcus multilocularis https://en.wikipedia.org/wiki/Echinococcus_multilocularis