I think it might be hard for "normal" people to understand. But when you have a disability, the world holds all kinds of extra challenges and unexpected and unwanted surprises. And every trip outside the home can bring some reminder of how the world outside is designed for normally abled folks and those that don't fit that mold are constantly being pushed to try and keep up where others can move about the outside world effortlessly.
On top of that, my body is just too high maintenance for travel. While I'm super healthy, I do have that pesky hypoglycemia. I need protein every 2 to 3 hours. And I guess it's because I'm a tiny girl, but I somehow came equipped with a little bladder to match. I can't go more than 30 minutes without having to find a bathroom. While I'm at home, I never have to worry about having enough protein around or finding a bathroom. But if I leave the house for too, I have to start hunting for these things.
I guess I'm a homebody. I like working here. I like relaxing here. Snuggling at home is my favorite date. I see no reason to leave other than clubbing and grocery shopping and the occasional treck to California or cruise to Alaska for a short vacation. I'm happy as a bug in a swank rug here.