I agree 100%. I grew up in a strict JW household, but we weren't superstitious. We made fun of "holy rollers" and "Jesus freaks"...all the while spending our Saturday mornings trying to convert people to our religion...strange.
As I got older, I always favored the secular side of things in the American "culture wars." As a believing Witness, I was against prayer in schools and against teaching creationism/Intelligent Design in public schools. Many times as a young person I said to myself that if I didn't have "The Truth," I would almost certainly be an atheist/agnostic.
For many folks, JW-ism is the gateway drug for secular humanism. The WT poisons the well when it comes to other religions. Many JWs identify their belief system more by what it is not than what it is (e.g., no Trinity, immortal soul, or hell). So, when a JW realizes that JW-ism is false, it's difficult to join another church that likely teaches all 3 of the aforementioned "Babylonish false doctrines."
Kind of like how Richard Dawkins says--everyone is an atheist about most gods (e.g., Thor, Zeus, Wotan); I just take it one god further. That's what many ex-Witnesses do. And it's perfectly understandable and should be expected.