I agree.  There is no requirement for liquid fuels for anything except aircraft*.  Oil may be required as an input to a manufacturing process (e.g. for plastic) but it is not required in order to power the process or transport any materials.

* Aircraft don't do well on extension cords, and it is unlikely batteries or fuel cells will ever be even remotely close to light enough to power non-trivial-size aircraft.


Just you wait - I've got a coal powered plane out in the barn I've just about perfected!!  :)