Such compromises are part of the case business. Other examples are the larger power button cutous to accommodate the Air 4, which are oversized for the Pro, or when the iPhone XS shifted the camera bump, adopted asymmetric bottom openings, and some cases didn't.
Some companies do make an effort o truly tailor their products to a particular model, adhere to all the details, and design to tight tolerances, but that can come back to haunt them when Apple makes minor changes with newer models. They probably curse Apple even more than you do.
It's easier, and cheaper to accept these small compromises, and design for wider compatibility. Most users probably won't even notice, or care.