Both sets of pedals are of course linked so that the second pilot could never have brought the helicopter out of this predicament. Would an input monitoring and control system like on large airplanes have avoided the crash?

There’s an answer [0] on Quora that describes helicopter instructors having to deal with students frozen out of fear and wrestling for control of the inputs. Nightmare.

[0]: https://www.quora.com/What-happens-if-the-pilot-and-copilot-...