There is a crack on the bottom Bezel (right half). The Bezel is glass covering the display cables so there is hollow areas beneath the Bezel. Putting any pressure on the Bezel can very easily crack the Bezel.
Personally I would cut a piece of black electrical tape to fit the height of the Bezel and place over the cracked area to help hold the cracked section together. Unfortunately for Apple to repair it, it will involve replacing the whole Display Assembly which is very expensive $600+ US usually unless you have AppleCare+ which would make it $99 US. The damage is already done so the OP may as well continue using it as is since the repair will cost the same today as it will later on if a cable becomes damaged (unless of course AppleCare+ expires).
I have replaced the cracked Bezels ($20 US for the part) on our organizations laptops, but this is not something an average person should do. Even an experienced repair technician can have trouble replacing the Bezel without damaging the rest of the laptop.
Yes, I agree it is a terrible design, but it is not the worst design with these USB-C Apple laptops. In fact it is a very minor design flaw for these USB-C laptops.