Inefficient?
"Fundamentally, lugging around 2.7 tonnes of van and employing a person to deliver a package is highly inefficient"
There is certainly some truth in that, but it's worth remembering that lugging things along roads is much more efficient than carrying them through the air, and we have in any case millions of people on this planet, all of whom have to be clothed, fed and housed, and preferably given something to do to keep them out of trouble, so unless someone can come up with a better "activity" for all these people it might be better to have them driving (electric) vans around ...