I agree that this point is somewhat weak but with fuel it's not so far-fetched to imagine that there will be changes: with a human driver, you have hard limits on the maximum time in motion so there's an upper bound on how much fuel it's worth carrying since you're going to have to stop after a shift anyway.
If you have a robot that can drive 16 hours straight, however, it's easy to imagine the incentives pushing companies to explore larger fuel tanks so they can use corporate depots where they can save a few percent on the operating costs.
If you have a robot that can drive 16 hours straight, however, it's easy to imagine the incentives pushing companies to explore larger fuel tanks so they can use corporate depots where they can save a few percent on the operating costs.