In the current system if your in the middle of nowhere town has 2 players it doesn’t matter how hard you try, you can’t get a legendary
unless you go to a bigger settlement
But then there’s another problem.
Niantic have a habit of not announcing the release date of future legendaries. Many people can’t get a trip to the city for weeks (or at all) after that and if they did then there’s Facebook and Discord and that’s basically it for communication. From experience you often need to be on the face book group just to get a discord link. These are usually closed and they might not accept you if you live too far away.