"You know - I can't see that you really need those magic thumbs of his to open the door. So why don't you sit TBT down and get him to explain to you how you can open the door for yourselves? Then you'd be able to come and go as you please. Tell him that he'd have a much more peaceful life if he wasn't always jumping up from his chair to open the door for you. It's clearly a win-win."
We Mews have actually discussed that with TBT. And he has actually had some thoughts on that. And he is seldom in a chair in daylight.
One involved a lever that we could reach up to and pull on. But he couldn't figure out how to make that safe. It wouldn't close afterwards. And we have hornets around here that want to come inside the house and he really hates hornets in the house.
Another idea he had was to fit a piece of plywood into the deck doorframe with a cat-flap at the bottom. But he doesn't want to find an opossum in the kitchen or an intruder cat sneaking in to bother us (we had one that tried to get in a few weeks ago). And it would make the door less secure.
And he says he would worry about us going outside at night. He says "there are owls". He says there are large ones in the swamp across the street. We are brave cats, but "owls" seem worrisome. We hear them hooting at night. You can't hear them flying though. Ask any mouse...
So, TBT says he will do the effort to let us out only in daytime for our own safety and stay out with us when we are. But we have to stay in after dark. Safe is a good thing.