-1- Ability to right the boat unaided and with simple means
If it's windy enough to tip it in you can get it back up again. Yes, if you tip it over in a F1 you WILL NOT right it on your own.
So you are in agreement with me.
In addition can a 75 kg person still right the discussed boat unless it is really windy ? If you are doing the wild-thing you may find that you can easily tip a boat in conditions qualifying as less than windy.
Wouter