boats were built to be in the water not land, so often they survive the storms better in the water than in a yard
Not statistically, according to BoatUS. They continue to recommend hauling for storm protection. Hurricane Sandy was an exception in their view - many boats floated off their stands. Since they pay the bills, I trust their judgement.
We also like to haul to let the hull dry out. I've seen instances where blisters can form in a hull left in the water continually.
To be honest, by late fall I'm usually tired of the boat and want to catch up with other interests for a few months. When the boat is in the water, I'm always thinking about it's condition. Hauling lets me shelve those thoughts for a while.