Unless these stats include details on both type of flying and type of pilot coupled with the numbers of aircraft in the fleet, these reports are a mathematical “fools errand”. For helicopters, both the most inexpensive helicopter and the one used in the most dangerous mission will appear at top of accident lists (so R22 and MD500), however this doesn’t conclude that either of these are inherently dangerous aircraft nor less safe than competitor aircraft.
Serious stats are normalised to account for these variations. If there are 100 R22 accidents per year it means nothing, as you suggest, but if there are 2 R22 accidents per 100,000 flying hours, or 50,000 landings, that's is a more useful metric. (Made up numbers of course, before somebody gets on the outrage bus and asks where I got my figures from......)