I strongly disagree. I think some forms of religion, Christianity included, are very good at explaining how to understand the world and the forces (especially good and evil) at work in it -- and it encourages its adherents to change the world for the better.
I also happen to think that these religions' interpretations of the world are wrong.
Hmm, well I would separate moral guidance and a knowledge for how things around us works. On a moral level some of religion's teachings are great,
I personally though don't take more than that from religion and think that it promotes being content with knowing less about our world and universe in order to make it's stories and non moral teachings more relevant.
I agree with your stance, but I disagree that religions don't encourage adherents to understand the world. As I said in the GP, I think the way they encourage adherents to understand the world is mistaken, but it still exists!
I also happen to think that these religions' interpretations of the world are wrong.