Why use a protective film rather than clear coat or silicone hardcoat?

A lot of people have a common misconception that headlight lenses have clear coating on it from the factory, however this is false. Rather, manufacturers use silicone hardcoat to protect the plastic lenses from abrasion and chips from debris while driving. Silicone hardcoat on the other hand is an expensive and time consuming process and no longer justifiable for the service we offer, that is why we use protective film instead.