And again with my Camry example, assuming 60 mph and 39 mpg, that's about 9 lb/hr fuel consumption.

The Cesna has a 140 mph cruise, a bit over double that of the Camry on highway, but that still means 20 lb at equivalent distance for the car, less than half the light plane.

Aircraft are fuel burners.

(Agreeing, just giving land-travel equivalent.)