I had one with a similar story, he taught the rest of my cats that inside is better, and that’s even been passed on to the newest cats even tho he’s not around anymore. Nobody wants to go outside, even on leash.

My cats sit by the glass storm door and watch me go through it. Not a whisker twitch to move. They are inside only and have no real desire to go out. All my cats have been like that. They are spoiled rotten and know it. Not willing to give up a good thing.