The question then becomes "who decides." The operators? The oil companies? The government?
Very doubtful the oil companies will - costs versus probabilities = costs win. Operators, unless they all get together and put their foot down - what's the probablity of that? - won't. As for the government regulating it, undoubtedly the first question would be - if we restrict helicopters from flying over let's say a sea state 6, what about commercial airliners? We all know what the answer to that question would be.