Yeah yeah yeah, sure it's the sensible thing to do....

However, contrary to popular belief, there are worse things in life than losing your balance and falling over the side of a rowing boat....and getting wet

Believe it or not, swimmer or non-swimmer, a dunking without a bouyancy aid doesn't guarantee certain death.
I see it as the thin end of the wedge, and we're creeping along to the fat bit at an inexorable rate already. No offence mate, but I value my freedom and right to make certain decisions for myself more than my life. If you value the thrills and spills and the freedoms of the outdoor life too, then you'd do well to stop backing up the folk who make these rules who don't know the difference between a bow and a stern, and stop patronising us with threads like this.