I'm not sure I understand your point, obviously it's not a replacement for a larger ICE vehicle with 4-5x towing capacity, but it's not designed or meant to be.
But what is it designed for? I understand it's appealingly different, but it doesn't do anything that a trailer doesn't do. And not much that any SUV can't do.
I have a homemade trailer with greater bed capacity than this pick-up that I got for $800 and use it for a myriad of things – from hauling lumber to launching small boats. I've driven it hundreds of miles to the closest Ikea.
When I'm not using it, it's not attached to my low-end SUV. But with the seats down, there isn't a whole lot my low-end SUV can't do as well as this toy pick-up, without range anxiety.