Jed Lowrie is going to start the season at AAA. This came right out of the mouth of Theo Epstein, you know, the Sox' Gm, that means they're signing someone to play SS, therefore, your assumption that Lowrie might start the season as the team's SS is a fabrication, AKA, made up stuff.
Where are the baseball examples?
Basketball and baseball are nowhere near the same.
Again, players need a developmental period, the fact that "you don't think" he needs a full year of minor league action means absolutely nothing because you don't know anything about player development, and even if you did, you've barely seen the kid play to come up with such "accurate" assessments of what should be his ETA.