Hmmm, I see your point Corwin.
I just find that using a very basic numerical scoring system is too inaccurate. *puts on analytical hat* It demonstrably promotes oversimplification and facilitates the glossing-over of bad points.
I think all games should use percentages. So 5/5 could more accurately mean 95% instead.
Oh well, at least reviews don't use a binary/dichotomy system. "Good" or "Bad"