Even then the article finds in these (stretched) cases you need to drive around 50,000 miles for it to break even. But even that - it doesn't seem like too much to me? Trucks usually are bought on the assumption they will be driven to very high mile counts.
Is it a concern? Yes. Is it actually fairly specifically about trucks and weight? Yes: they are quite explicit this is about trucks, and weight, and they impute a huge amount of the carbon burden to the weight.
If we want to fix/track this, we need mandatory reporting. Not guesses.