Money ‘in’ still has to equal or exceed money ‘out’ in order for an operator to be viable.
You could try to insist that you’re charged on the basis of time in service - wheels off to wheels on - rather than e.g. battery on to battery off. All that would happen is that the hourly rate would be increased accordingly.
Remember, you’re still in command or dual while operating the aircraft on the ground, and that’s aeronautical experience that goes into your logbook. Part of the learning experience is to resist the urge to taxi at 25 knots and rush through run-ups, to save $50. If you have an accident as a consequence, you’ll be a lot further in the hole than $50.