Let’s say someone’s family was in the army, so they moved around a lot from birth, and they didn’t really have a ‘home,’ but they’re into sports—how do they choose their favorite team? Do they just decide to hold off until they move somewhere permanently, and then choose that city’s team as theirs?
Geography is your best answer. If you pick a time that plays half their games close to you that means you can go watch games in person once in a while. It means you and strangers on the street likely have in common seeing the same games and so can talk about them. Nothing wrong with a distance team, but you miss out the major advantages of a spectator sport by not choosing the local team.