MM - Amen!!
Plenty of people think they do 'it', whether that is SPIFR in a Chieftain or a B200/350. It all looks easy from the outside. And they probably could get away with it too, whilst the going is good; be out there flying unbeknownst that luck is their copilot for ages - until the day that the luck runs out, and people get killed.
Operating the turbines is just one part of the equation - there are many peripherals and variables in turbine aircraft operation and a solid experience base makes for more capable 'transition'.