It makes sense, in order to identified that which is not yet identified, we have to go exploring. Same with God. We are told, "Seek and you will find." Some seek, some find. Explorers.
Both are explorations some opt out of, and usually it has more to do with "not worth the effort/bother" than it has to do with belief or lack of belief. "Too lazy to bother" isn't something anyone is all that willing to say out loud, whether it comes to a great exploration or whether it comes to joining an exercise program. "I am too busy" or "I don't believe in it" just sounds better. Especially to oneself.