So the guy who bought that truck bought a list of capabilities without ever intending to use them for that. He just wants to know he can if he wants to. (He never will.)
I say that with some confidence because duallies are awful for off roading, but great for towing and hauling. Off road tires are awful for towing. They're awful for daily driving. They're really bad for anything that isn't strictly off road. This truck is in every way a pain in the ass, but it makes it's owner feel a certain kind of power, and that's what he's willing to fork out the cash for.
He did that in Maryland specifically to prevent a rail project from being built. There's not much that Elon hates more than public transit for some reason