I think he's questioning why a 13 year old would suspect his crush's friend was the daughter of his idol, that wouldn't cross anybody's mind, especially as they have different surnames.
Does MC know Zo plays for the local team? Sure. Does that mean he lives "close"? Not really. Plenty of athletes live more rural and commute.
When MC first sees Alexis' house, he's shocked at how big it is. If it was in his neighbourhood, would he really be that shocked at such an affluent house? It's clearly a part of town he isn't familiar with.
I agree that it's not quite the same neighborhood given that the MC sometimes takes a bus home(or gets driven), the MCs neighboorhood also looks notoriously less affluent.
The feeling i get between those 2 neighborhoods are "you can walk for 30 minutes or drive for 5", but it's not 100% clear.
MC is a Zo fan but not those TMZ types that knows everything about his idol(he's often the dummy that doesn't know anything besides the basics).
In real life Zo would live in a gated community or have to deal with people camping in front of his house(maybe not now that he's retired, but certainly while he played), but nothing indicates that's the case in game, we can arrive at the house without any previous approval.