Review scores

When games are released, there are companies who make money by reviewing them (also all the guys on youtube but I think they make less monies) and most of the time, reviewers give them scores. Why have scores at all? Well, there may be some reasons for and against scoring games in reviews. For a positive, it's easier to tell which games are better. A reviewer that doesn't use scores may say that two games are good, but the readers may not know whether its better than a certain game or not. On a negative side, most reviewers use different score types, whether it is out of five or twenty. If all scorers had a universal scale, it would be fine, but think of it this way. A scorer gives a game 3 and a half out of five. That's pretty good, but change that to a scale of 10 and you get 7 out of 10, which doesn't seem as good. Change  that again to a score of 20 and you get 14 out of 20. Seems a lot worse than 3 and a half out of 5. Change it for a last time to a scale of 40 and you get 28 out of 40. So, different scores may make it harder to find a universal average for games. Scorers also have to review that full game. Super Mario Galaxy may be one of the most spectacular games ever made, but its not perfect, thus the reason we can't give it 10/10. Why isn't it perfect? Because of two things. The camera (but that's minor) and the storybook room. MY GOD THAT PLACE IS LIKE HELL ON EARTH! Basically, you get a boring tale of Rosalina and the lumas that you can't skip. But oddly enough, you don't ever have to go in there if you don't want to. So why not only take points off the final score for the camera? Well, you have to review the game as the package. You can't say "this game is perfect except for this one thing, but just ignore it" You have to take the whole package. But since its optional, no-one will really go in there, meaning that those people who never went in there would have more than a 9.5/10 experience. So, anyway, should our blogs go to scoring or keep it as it is? And what scoring should be used?