You are going to find that there are people who care about knowing and learning, as opposed to caring about what they believe.
Beliefs have little to do with what is provable. If I told you that due to my own anecdotal musings, I think that (wo)mankind is hardwired to search for meaning and purpose in life, and that this seems to trump all else, that is a belief of mine that knowledge and learning can't validate 100%. If I tried to say that this quest for meaning is essentially what the word "spirituality" is turning into, those who disagree with me would debate me not on the substance, but on the semantics of the word "spirituality".
At a certain point, esp after leaving the WTBTS, one must engage in a years long quest, to question everything, to read, to be open minded. At the end of that journey, one only need find himself.
What happens often (it seems to me anyway) is that instead of being open to other ideas as a quest, the quest turns into a search for self-validation. (i.e. "I know God exists, I must find out where, how, and who is worshiping him correctly, or at least to my tastes....." or "I am certain God doesn't exist, and I will immerse myself in what I already know...")
Either way is flawed. It is much more honest, and much more difficult, to say at the start "You know what? For whatever reason, I bought into the GB doctrines. There is a lot to learn. I need to be really humble and observe and learn and READ."
I think it curious that one very major question is not asked by many when they first leave, but to me, I wonder about it for everyone who ever leaves: What was it about me that caused me to believe the GB dogma and that got me to stop thinking? Why did I believe it? What was it about me that was, in my own fashion, attracted to the JW's in the first place?"
To me, that is where all of us need to start imo. If we can figure out ourselves, and why we somehow bought in, even if we were just born in's, then it gives a much more solid platform to launch into a search into what we know, if only because we start with ourselves first.
At the end of it all, we will not add to what we are, but discover what we are, and from there, comes the knowledge of what we know, that makes each of us unique.
I am very much an existential person, and what gives purpose and meaning to an individual while at the same time, respecting the differences in others is a higher road to tread. We all need to "know" and believe in something. But there aren't shortcuts to it. It takes time, serious introspection, and dedication to mine out who we are and why we are here.
Peace!