By the nature of being designed for moving from one location to another and for working while on the move, notebooks like the MacBook Pro aim to be as light as possible while still being strong. However, the pursuit of sacrificing weight can turn into a reduction in strength.
One of the main casualties of this tradeoff are displays, which can be subjected to torsion effects from twists of the display lid, which is usually kept as the thinnest section of the notebook’s body, and so contains the least material.