Changing wiper blades, has been best described as something to do often. Once a year or so. This cuts down on chatter and improves their efficacy. Consumer Reports found changing your wiper blades more often is more important than buying the best wiper blades "once".
This soft rubber is often exposed to elements with force and tasked to clean them. Sun, rain, washer fluid, bird shit, your wiper blades take a beating. Mercedes built their wiper blade system ingeniously. Incredibly quick to change.
One circular pin and a catch. You raise the wiper blade, rotate it on its axis (not against the motor) and the wiper blade pulls away. Installation is the same but reversed.