The problem being with the 2 metre rule how do you man a two person sailing boat. How do you chose in a 400 member club who can race who can not?
There are on a Normal Sunday 4 race series, if at the club or on the broad and two if a down river to a pub and back. each series includes at least 6 starts at 5 minute intervals each start may have 10 boats or more. If you are all going for the same trophy who do you chose to allow in?
Then the other problems,
The start finish line, we normally have a time keeper, officer of the day and assistant officer of the day all on a small platform and office.
Then there are the rescue boats, helm and crew rarely from the same family, having to rescue a third party. , 2M it's not possible unless the crew is sat right on the bow. 1 + it is, with the crew doning masks and gloves for rescuing people out of the water, as per ambulance crew..