Why is this more sensitive than people being able to replace brakes, brake calipers, brake cylinders, headlights, etc. etc? Why is there now a panic about it?

Why is this more sensitive than people being able to replace brakes, brake calipers, brake cylinders, headlights, etc. etc? Why is there now a panic about it? (Yes, I know the answer is: the manufacturer wants to extract money from it, but let's play this game where we defend corpos.)