Moving on - a good way to think and to be!
For so many people, moving on just doesn't happen. Stuck in memories of the past, or stuck where they are - they've put down roots, they've been here "too long," they don't want to start over in a new place. You've heard the long, long list of reasons (excuses) why people remain stuck in a situation they complain about but do nothing to change.
I like your insight that "not in my backyard" implies being in a superior position over whoever would encroach into "my" yard.
And the legal ramifications, the ownership, the territorial ways of people and animals alike - you cover it all in a few short words!