I hope that the "shortage" of drivers will lead companies to prefer shipping by rail, which is much less polluting, easier on the workers, and more efficient.
It's been small utility trucks ever since, driven on short hauls, by people who might well live walking distance to my house.
A train would never deliver to my house, but to this day there are still unused train slips leading to factories around my urban area, and in Europe there are plenty of shopping malls that have a train slip as well as a truck loading bay.
(Except politics, that is)
The reason it isn't done this way is certainly not the amount of labor.