The T/W rule was put forth by the experts.
The first attempt at limiting speed in the EARLY days of turbine modelling.
Speedlimiters, Why do I need one when your airplanes don't? My engines all have the technology integrated into the ECU I use the devices but I don't feel like they are necessary. I have a left thumb, know how to use it and have more than just a flbby chunk of meat between my ears.