It certainly worked for GA.
There are huge fleets of fast, sexy airplanes that are financially well within reach of many PPLs, who would be legally qualified to fly them, or could become so without much effort or expense.
Problem is that neither hull nor liability insurance for many fast and sexy airplanes can be had without meeting some very stringent experience and recurring training requirements.
What is the financial cost of destroying a turboprop full of passengers?
The insurance providers know, and they will act to protect their interests.