True. Just that even if it were all Republican, doesn’t mean we’d flip the area.
You can't tell how many ants there are by counting only the ones you happen to notice.
Hide some Trump votes, invent some Biden votes, and have the tabulators count Trump votes for Biden. That flips the vote....which it did.
You might not flip that particular area of a state, but in a state-wide election such as President or Senator, ballots not counted anywhere affect the state-wide total and could swing a close election.