I cannot imagine how excrutiating it would be for my wife to have to pay a bunch of stupid taxes and follow a bunch of fascist new laws in order to grow her 100sq ft garden every year which, even so small, STILL requires truckloads of compost and mulch since we are just in the process of building our soil. And that's just for the gardens. I don't have any idea how many times we've hauled in cow, pig, and goat panels. I propose that the assholes proposing taxes and limits on trucks find a way to bring us these goods.
We are talking about the poorly designed showboats that do nothing to improve hauling capacity or utility. In my experience, I'd vastly prefer a lower bed for any of the tasks you mention. The extended crew cabs, stubby beds, and jacked to hell trucks are for aesthetics, not hauling mulch.
Plus you don't even seem to realize the distinction, just emotionally (and perhaps intentionally?) misunderstand what is under discussion.