Don't second guess, he likes the inside so that's where he's meant to be. You know he'll be much better off, besides Hawks can keep the rats at bay and Coyotes, well I don't think too highly of them.
I moved here in 1984 and haven’t ever seen a rat anywhere around here. Very few snakes either. But my outside Ferals did bring me a present today. A nice big juicy mouse. Lol