Actually, I'm seeing the car analogies and the different arguments like this:
People that use screen protectors:
"I installed 3M wrap on my new car's hood/bumper and there's virtually no scratches from sand and rocks being flung from cars driving in front of me."
People that don't:
-"I don't hear/see anything hitting my car, but those scratches and dents from driving normally obviously means there's a defect with the paint job."
-"My new car has been sitting in the garage for a week and out of the blue, there's scratches - must be bad paint."
-"This car is $50,000, it's crazy to spend an extra $200 for car wrap. Also, wrap is salads - not cars. At this price, I expect way better bumpers and paint that don't dent without salad wrap."
And the few outliers:
"My car has a lamp-post shaped dent in the bumper but also scratches and dents around it that look like what other people are writing about. No, I didn't drive into a lamp post - it's pretty clear there's a quality control problem."