Drake, it's a commuter car. The whole point of the thing is to be small because it only needs to move 1 person from their home to their work. If it can carry 1 person and their lunch box in an efficient manner it's done what it has to do.
It's basically a motorbike with some training wheels, a roof and a seatbelt.
It'd work fine for me, because if I have to deliver something for work, I'm not using my own (admittedly tiny car), I'm using the 3.5 tonne L2H2 MB Sprinter from my boss. Purpose built commuter cars aren't meant to take more than 1 person a relatively short distance.
It's basically the same idea as a Piaggio MP3 LT (3-wheeled scooter with enough track width to allow a car-license to drive it) or a Renault Twizy. They're very niche vehicles with little day-to-day practicality, but the thing they were designed to do, they do uncompromisingly well, better than a more all-round car could ever hope to.