I used to work with Cell phones. Back when the iPhone 4 (or maybe the 4s?) came out, with both the glass front, and glass back, we had a lady who refused to buy anything for it.

No Case.

No Screen Protector.

No Insurance.

We emphasized many times that because the phone is glass on both the front and back, it was very fragile, easily cracked, and must be protected/taken care of. She wasn't having any of that.

She walked out with her shiny new phone... and immediately dropped it on the concrete sidewalk outside the shop.

And somehow had the absolute balls to come back in and demand we "Do the right thing" and replace her now smashed phone.

We didn't.