According to the FAA accident database, in the USA, calendar year 2016 through 31 Oct (the last date I have data for) there were 24 Robinson accidents with 4 total fatalities and 33 Bell accidents with 12 fatalities. Don't know how that breaks down into an hourly rate per type, but certainly Robinson training hours are a big number. So if we are throwing out the baby, don't forget the bathwater, too. Maybe SFAR 73 is working. Or maybe it's a statistical anomaly.