The problem is games are so expensive and there are so many of them you can't try them all, so it's not enough to know a game exists - you need some indication

The problem is games are so expensive and there are so many of them you can't try them all, so it's not enough to know a game exists - you need some indication it's worth buying. That's the purpose of a review, and if you can't trust the reviewer to be reasonably unbiased it's of no value.