As a rib user, I can't see it makes a lot of difference to performance or usability. As a Broker, I can't see it being that critical either. Obviously if the hull is not anti-fouled, then you can check the condition more easily, but if the owner has a need to anti-foul it, then that's understandable.
If the anti-foul has been applied properly (decent abrasion, primacon, 2 x top coat, etc) then removing it will be a nightmare - best left to someone else. If it hasn't been put on properly, it will probably remove itself given time!
You get what you settle for!