I have a hard time believing that truck drivers are a diverse group of people when they're really only popular in a single region of the world.
Painting a diverse group of millions of people with a broad brush, and making a claim that they're "all basically the same." History has something to say about that mental move.
For the soyboys drinking their vegan milk and driving their lime bike to pride parade, it might come as a surprise, but it in indeed is. (<= This is an attempt to show that how any group can be dangerously maligned)
Trucks, especially the variety seen in the US, are practically unheard of anywhere else in the world. When a specific style of vehicle is that popular in a single country it probably has more to do with legislation than driver preference. There is almost certainly a decent portion of people driving trucks who would prefer an alternative form factor - if only it were available. It'd make sense to distinguish "truck drivers" from "people driving trucks".