Comment by pigpop

The analogy is pretty apt but you should keep in mind that a human is still doing work when driving a motor vehicle. The motor completely replaces the muscular effort needed to move from point A to point B but it requires the person to become a pilot and an operator of that machine so they can direct it where to go. It also introduces an entirely new set of rules and constraints necessary to avoid much more consequential accidents i.e. you can get to your destination much faster and with little effort but you can also get into a serious accident much faster and with little effort.