With accident statistics, you really need to compare apples with apples. For example it is no good comparing a mustering R22 in north Australia with a S76 flying offshore on the North Sea. You must compare helicopter types plus the type of work they are doing plus factors such as topography, weather, etc. I refer to civil accidents only as military ones have a totally different criteria. Also the experience level of pilots is important, not just the total time but hours on type & role. For example I expect a pilot with 10000 hours S61 offshore in GOM or the North Sea, would not be much use flying a Bell 47 on crop dusting compared to a 47 pilot with 500 hours total all crop dusting.
Obviously any good pilot can be taught a different role but that would involve training & gaining experience and unfortunately that is not always taken into account either by the pilot or the operator.