It's value lies -- not in showing that it is prudent to believe in God -- but that a prudent person must take the question of God's existence seriously.
Integral to Dembski's idea of specified complexity (SC) is the notion that something extrinsic to evolution is the source of the specification in how it develops. He compares SC to the message sent by space aliens in the movie "Contact." In that movie, earthbound scientists determine that radio waves originating in from somewhere in our galaxy are actually a signal being sent by space aliens. The scientists determine that these waves are a signal is the fact that they indicate prime numbers in a way that a random occurrence would not. What is interesting to me is the fact that Dembski relies upon an analogy with a sign rather than a machine. Like a machine, signs are produced by an intelligent being for the sake of something beyond themselves. Machines, if you will, have a meaning. Signs, if you will, produce knowledge. But the meaning/knowledge is in both cases something other than the machine/sign itself. Both signs and machines are purposeful or teleological...
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Maybe an alternative version of what you propose would be to say that before one considers whether God exists, one must recognize that the very act of seeking to know the answer is an act that is demanded by the very structure of human desire, and especially by that form of desire called wonder.
Instead of saying "even if God doesn't exists" it says "before we attempt to answer the question of whether..."