I've never seen anyone decide not to get an iPhone because the screen is too fragile. I have seen people decide to upgrade their phone because the screen on their old one is broken.

The design of the Nexus 5 has a razor thin plastic bezel surrounding the edge of the screen glass. Minor bumps push through the plastic and crack the glass from the edge where the glass is weakest. The push for thin phones and tiny bezels is a cancer on phone design.