The numbers are skewed....many people don't tell the truth.
Also, please keep in mind that the vast majority of JW's aren't educated on their own religion. They couldn't explain 1914 if they had to. Those that do have an inkling that its incorrect usually just say 'oh well' or 'well, we are doing the preaching work'
The lack of true heart motive and education on what they claim they would 'die for' is unnerving. My own family knows NOTHING about "the Truth"...... yet they keep showing up, daydreaming and leaving.
Go to a meeting on a Sunday. No one is listening. Listen to the WT comments....they are parrotted out of the paragraph.
None of them know why they are there......most stay in for social circles, family ties and not knowing any better.