RE that Bulldozer story: How would a worldly bulldozer driver inadvertantly go to a Kingdom "Hall" under construction because the word sounds like "Mall"? The building was under construction, so it would be highly unlikely they'd have a sign up. That's usually a final touch. Also, this would require the driver to have at least some familiarity with the word 'Hall' as short for Kingdom Hall, otherwise he'd never make such an association.
These stories bring up the question as to how closely God (assuming there is one for a moment) would be in human affairs. As many comments have already pointed out, it means God picks and chooses whom to assist and whom to seemingly ignore.
And also as mentioned, such stories are not the sole domain of JWs. I'm reminded of news of plane crashes where survivors will say stuff like 'God must have some purpose for me' while people died all around them. Makes no sense.