I second you on the DOF, but not on the "majority" of shots not suffering from 1/500 shutter speed. We should not forget we are shooting in 4K and the amount of pixels moving quite fast. Lets look at the standard POI shot, circling around an object at a speed the viewer does not get bored with...
Now here around 90% of the image information is moving quite fast, and the grass is carrying many details. It will never look smooth without appying the 180° rule... Same for nearly all the "quickshot" modes.
I am with you, flying at 300ft over a valley with the Mountains 10 miles away in the background will look perfectly fine at 1/500... as long as you do not start to pan....