Why what does that help? Saying something is good and explaining it's good are two very different things. Your not explaining why it's good to do that. You just keep stating it is good.
Just trying to be clear,
Are you asking why is it good to distill a large amount of information into an easily digestible format (such as a color, number or star rating) in addition to giving the information?
If I'm experienced player knowing how good a guide creator thinks the monks unarmored defense is may give me some insight into his thought process and or let me know if his assumptions on the game line up with mine. But if I'm already that advanced of a player a guide likely isn't very useful to me in the first place.
For players that are newer and can benefit a lot from guides, is that information useful at all?
Again, are you asking why a new player would want a large amount of information distilled into an easily digestible format - in addition to the information itself?