The experience in Old South Wales is different from New South Wales - their police unit has had one B206 go for a swim from an engine running down to idle (bleed air leak) during the day. One 206 chopped off its tail during training for night touchdown autos. One BK 117 went swimming from an engine cowl going through some of the blades, and a Twin Squirrel swimming because of a pilot error - all daylight.
Sum total - around 40,000 hours of operation of single-engine machines, day and night, over populous and non-populous areas, for one real accident and one training accident.
They had done only 300 hours in the BK and a similar number in the 355, for two prangs.
The only trouble at night was night training.
You tell me the statistics.