I understand your argument, but Hogan played blades where as today a good percentage of pro's use GI irons (Ping G series, cavity backs, etc) Even the muscle backs of today are more forgiving than the blades of Hogan's era. Eliminating distance from the equation, I don't think many will dispute that hybrids and more forgiving irons have made it easier for the pro's today to be good ball strikers.
I've seen guys wearing the G series hats but always assumed they were plying the I or S series. Who do you know of that actually plays a G-series on tour? Not doubting you, just surprised.