Agreed. Who’s the “they” that’s orchestrating this? If it were a top down effort, wouldn’t there be enormous pressure for any one car company to break rank, make beautiful cars, and sell them like crazy?
To build on your point, car companies are all dealing with the same laws of physics, guiding them to similar aerodynamic designs. Also, these days car manufacturers often re-use the same car platform/chassis for many different models, further restricting their design in exchange for better production efficiency.