Unless you hang around people in the construction business or farmers, I would bet if you ask people how often they haul anything (other than groceries), you will find that most people will tell you that they rarely haul anything that requires a truck or an SUV. I have to agree here. I live in a very country area, and at least 95% of the time the only trucks I see hauling anything are work trucks with a company logo. I also rarely see more than four people in an SUV, usually one or two.
But I won't complain, because what's the baseline? You apparently say average sedan is it, anything more is a waste. How about we do this:
If you are one or two people in the car, you really don't need any more than this. So we should punish everyone driving something larger.
I actually wouldn't mind one of those (with the 3 cylinder diesel engine) for commuting.
But, I wouldn't want it forced on me by the government.
And, FWIW, I live in a rural area, and have a full size pickup. I don't drive it much...mainly to the feed store, to pick up hay and feed. You might not be able to see the stuff in the bed from a car, but it's in there.