How is obsessive focus on metrics making anything more fair? Even if you have metrics, choosing which ones are important still ends up being subjective, and the

How is obsessive focus on metrics making anything more fair? Even if you have metrics, choosing which ones are important still ends up being subjective, and the metrics are usually incomparable between projects. So the metrics alone don't tell anything useful and can still be easily gamed to make the manager's preferred employees look good and disliked employees look bad.