How often does the Typhone routinely travel within a few metres of humans, other vehicles which vary in performance from "the same" to "a fraction of your speed"?

How many traffic intersections are there in the sky? Roundabouts? Wildlife? Domestic livestock?

Yes - by several orders of magnitude.

Typhoon's only flight inputs are basically: desired pitch rate, desired roll rate, desired yaw rate, desired power output. The whole airplane is completely controlled by a computer (all of the control surfaces, engine controls), which gives you an artificially stable, crazy overpowered, laws-of-aerodynamics-defying video-game-like toy to navigate in a huge and completely empty 3D environment. So, yes, self driving cars are infinitely more complex.