..and 2) choosing to ONLY see it from his/her own perspective and no one/nothing else's, losing sight of the entire purpose behind being on the third side AND adding only one more layer to the complexity of the situation (or complex variable) and not bringing a sense of outside-the-box perspective, not being able to come to an unbiased judgment, and not being able to come to a unique conclusion.
To lose the potential knowledge, advantage and perspective gained by attaining the third side is a squandering---a waste---and can only limit instead of enhance.