
Urban, suburban, and rural all carry their own risks, no matter where you are there’s still the chance of danger from cars, parasites, ticks, illnesses, other animals (dogs, coyotes, skunks, raccoons, other cats), getting stuck somewhere, getting lost, frostbite, hypothermia, dehydration, and heatstroke
It's true to say this about feral cats, but even larger than that is "outdoor cats", ones who have homes and owners to return to and by that measure cannot even become a native population subject to environmental pressures, while still hunting small animals all the time for sport. It does seem cruel and even sociopathic to imagine from the cat owner's perspective, but from an environmentalist perspective that type of bluntness does make sense.