[FabHK]

Electric motors with fixed pitch rotors are much simpler mechanically than piston/turbine engines and fully articulated rotor blades.

Furthermore, with the drones, you have fly by wire, with control inputs translated into manoeuvring in a simple manner, so pilots will require much less skill.

For example, one has to log a certain number of landings in a helicopter. In a Volocopter, you'd literally just slide a button on the control stick up to take off, then slide it down to land, and do that N times, and you've passed that part of the requirements.