They benefited from each other. Scoring isn't always the most important thing. Pippen was the perfect player to compliment Jordan because he was longer and just as good a defender and could handle the ball, and make plays.
You can say that they could've gotten another scorer, but how many other guys would tailor their game to compliment Jordan? not many.
Pippen should not even be debatable as far as importance to the Bulls titles. Jordan was a transcendent player, no doubt. You will never see me trash him to prop up Pippen. But, I saw Pippen play live every home game at the end of 93, all of 94-96, and what I saw was a guy playing his best and keeping a team afloat when their best player left and helped to win titles when he came back.
So, I don't get where the Pippen diminishing is coming from. He was not Pete Myers and he certainly wasn't as replaceable as you seem to suggest.