I think they chose the design because they thought piecing together and welding flat panels would be cheaper/faster than a curved fiberglass/carbon fiber body.
But it just looks like something someone made in their backyard. Like when a dad buys a Harbor Freight welder to make their kid a little play car. It looks like it’s going to rust and cut the shit out of me.
They chose the design because Elon Musk is a child and wanted to have a car from Bladerunner and then the engineers had to cobble something feasible out of Musk’s stupid demands
i have to figure he just made a drawing on a napkin and said “this is the future, make it for me”