If you have to question Chase's reasons for showing such scenes you're missing the point.

BUT, to use your "argument", do you really think that if the Spatafores simply moved to Maine their troubles (and Vito. Jr.'s) would simply disappear?

Little Turd Boy is over-reacting out of anger (about his father). Tony, in his home-spun philosophical way hit it on the head when he said that a geographical answer was not the solution to this issue. He (Vito, Jr.) HAD to be made to face what was REALLY bothering him.