What you say is true.
I'm here for 4 months, and I'm still trying to figure out how some posts that are just plain crap make 10x more than post written by people that have very innovative ideas, and write brilliant articles. It really bothers me, so i'm working on some kind of a campaign to get people to stop upvoting crap. (The problem is that crap often gets a lot of upvotes, so it is profitable to upvote in terms of curation rewards)