...Because most of what people are searching for is unknowable!
The more I use my brain instead of let the WTS do my thinking for me, the more I believe that it's impossible to identify truth. I think we're capable only of identifying what is not true. How many absolutes (beyond physics and mathematics) are there, I mean, at least in the realm of spiritual beliefs? As much blustering as the WTS does about how the bible is a book of provable truth, their arguments always boil down to faith, which really means the suspension of reason.
I'm going to stop chasing truth and simply try to eliminate what is untrue from my belief system, and see where that gets me. Is this your approach or what works for you?