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the other advantage I have found of fetch lands is that they allow you to shuffle your deck, so that if you are getting no land draws, but you have a fetch land, you can shuffle your deck in hopes of getting both a new land from the fetch, and additional land draws. So its win win.
If you a drawing from a "land pocket" you still will have no idea what card you are drawing. The only difference from; shuffling and drawing a card, and not shuffling and drawing a card, in the short term is all in your head.