Desert Duck
Realistically, I don't believe the PC12 is being "bagged". It is a well made and sound aircraft. Over a piston twin, I'd take the PC12 any day.
However,l it doesn't really exceed the performace of a B200, and is not overly cheaper than a good second hand B200, and quite simply adds another operational concern - it has only one engine.
All the statistical points that might excuse this are really only to help overcome the obvious- It absolves the bean counters conscience.
Patients who might need to travel in these a/c are subjected to limitations without the ability of raising their objections. There hardly likely to say "no" in their condition.
Affordable level of safety and risk minimisation by choice rather than by imposition would be a fair argument here.