I know this is hard for you to fathom, but sometimes it's interesting to know the opinions of someone other than yourself.
I can probably count the number of people I know whose opinions I trust on beer on less than three hands. I suppose I could just email them all and ask them what they think about a certain beer and if they've had it and are willing to email me back, I can form some kind judgment call on what other people think of the beer.
Or, I can look at a site like Ratebeer, where 1326 people have rated a beer, and trust that most of them have taste since they went out of their way to find the beer and took the time to write a review.
to me, it seems that you're picking and choosing the rating system that happens to back your argument at any given time
Why do we need a rating system at all. You either like the beer or not. No one elses opinion should matter.