I disagree myself. You can give everyone the same mathematical equation, but not everyone is going to get the same answer. Even beyond that, just because a magazine tells you who to draft you still have to be up to date on injuries/trades/etc. Hell right after I took Papelbon last night, some schmo grabbed Nathan.
You also have to know how to piece your team together to form the most balanced roster you can. Position scarcity, rookies, bounce back candidates....there's plenty to process.
I've played in one league for the last four years. There is a 150 dollar buy in. I've finished 1st,2nd,1st and 2nd in the four years. I must be doing something right that the other guys who have the same info I do aren't doing.