Don't get me wrong on this, I love driving.. the right car. But, most of the time, driving is one of the most unproductive things a human can do in the modern world. I guess you could argue that some commuters (who aren't driving themselves) don't exactly fill that time with the most productive things but thats a separate issue.
I think this oversimplifies life and realities.
You don't have to be "productive" all the time. As you put it, driving the car is not just a chore - things happen along the way. It can be a chore - I just contest the most unproductive label here.
By this token, sleeping is the most unproductive thing in the world. Except you recharge.