I can't race my car against another driven by a F1 driver very easily, play golf against Tiger Woods, play football against an NFL team, etc. etc. etc.
Sailing is fairly unique to where you CAN go out against top talent.
OTOH getting beat by a tosser that doesn't know port from starboard but can hire a rock star crew and buy new sails every week and doesn't give shit what damage they have to fix or pay for can wreck a class.