"Airplanes don't flap wings after all." but would be far more economical if they did.
No, they would not. Physics doesn't work that way - you can't just arbitrarily scale things. A bird-sized aircraft can certainly benefit from unsteady aerodynamic viscous force interactions, and insect-sized aircraft don't work without them at all. However, at large scales the inertial forces of the airflow completely dominate the viscous forces. A flapping aircraft large enough to carry a human is possible, but nothing near as simple or efficient as a fixed wing aircraft.
would someone please at least a security engineer before they design the control API for the thing?
No. There's no pleasing security engineers.
We have a equal opportunity Calculus class -- it's fully integrated.