Well, at this point the issue becomes who's looking at your rating. This "additional piece of information" exists only for people who have a sufficiently large sample of your previous ratings so they understand where the latest rating fits in the overall shape of all your ratings.
Consider this example: I come up to you and ask "So, how was the movie?". You answer "I give it a 6 out of 10". Fine. I have some vague idea of what you mean. Now we wave a magic wand and bifurcate reality.
In branch 1 you then add "The distribution of my ratings follows the distribution of movie quality, savvy?" and let's say I'm sufficiently statistically savvy to understand that. But... does it help me? I don't know the distribution of movie quality. it's probably bell-shaped, maybe, but not quite normal if only because it has to be bounded, I have no idea if its skewed, etc.
In branch 2 you then add "The rating of 6 means I rate the movie to be in the sixth decile". Ah, that's much better. I now know that out of 10 movies that you've seen five were probably worse and three were probably better. That, to me, is a more useful piece of information.
I understand and concede to the better logic. This provides greater insight on why the original attempt to use these ratings failed.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.