Your observations are valid. I’ve had every iPhone except the 5 and 5s. They all scratch and they all break. Screen protectors help in some instances but, in my experience, not all.
Screens become scratched when they come in contact with a material harder than the screen or a coating applied. Coatings include oleophobic and anti-reflection materials.
Many people are surprised when the screen comes in contact with everyday household items such as drywall. Drywall contains silica which will scratch almost all materials but diamond.
Here’s a list of common items found in and around homes and offices that contain silica.
- Sand, soil, rock, gravel, sandstone, slate, granite, and clay
- Construction materials: Concrete, concrete blocks, manufactured stone, roof tiles, bricks, blocks, grouts, mortar, and some joint compounds
- Other products: Glass, ceramics, plaster, porcelain, cleansers, skin care products, and talcum powder
My mother frequently used various powders and I saw her literally take the surface off the Sapphire Crystal on her watch.
The notion that it’s only dust in pockets is false. Ever consider what stone washing pants leaves in pockets?
I choose to go without screen protectors, preferring the feel of the bare screen. I accept the inherent risks of doing so and have never had an issue when trading in my iPhone, scratches and all, for the next release.
Not sure this will help, but hopefully explains some of the challenges in keeping a glass screen in perfect, scratch free condition.