I think of how many stars Tom doesn't have and how many more he should have. He deserves them. Maybe the unbalanced stars are meant to draw attention to how underappreciated the host feels. Maybe even they're a cry for help! Not only in the interest of symmetry, but also in the interest of Tom's mental health, his stars should be balanced. Even from a selfish point of view, you really don't want Tom to go over the edge. What if he really does lose it and decides to run off to Montana, live in the wilderness, and write spiritual novels about his imaginary conversations with the great spirit? We'd all lose then.