It very well could be true. But I also don’t really think you’ve been able to watch your cat every moment of his outdoor life to know he literally never goes anywhere and has never killed anything. My cats are indoor only in a tiny apartment and I frequently can’t figure out where they are, even when I worked from home.

I don’t remember blaming cats all man made environmental catastrophes, but whatever.

Cats don’t always show you what they kill. I had a roommate that kept letting my cats out. Never saw them kill anything. Then my neighbor told me about how they were little murder machines while I was out at work. Tried taking out a whole near of baby birds.