I wonder if you read it here in this thread?
Personally I think it is a silly idea. People who really think about their faith and, as they say here, “wrestle with God” are probably using their intellect more than those who stop at “the Bible says it so I believe it”. Some of the most profound thinkers I have found have been engaged with religion. What one believes about religion doesn’t make one a genius or a fool, but how one cultivates what they believe might. I think there is depth to religion so long as one isn’t too passively engaged.
Oops, wrong thread. There was one recently that addressed your question and I thought I had found it. But this one addresses a different criticism of religion. Perhaps someone else will remember which thread it was that addressed your question, or perhaps my memory is just misfiring.