Almost all of my iPhones have died because of my terrible treatment. And, yes, I use cases. My 6s I dropped face down outside, and there must have been a pebble on the sidewalk or something. That’s the second time I’ve damaged a phone that way.
When my daughter was a few weeks old, and I was very sleep deprived, I ruined two iPhones within a week. The first one, I think I had it in the diaper bag, and one of her bottles leaked and ruined it. I went and got a replacement, and I think I had to pay some fee... like 100 or 200 dollars for them to give me a replacement. Then two days later, I had my phone in my back pocket, and when I was pulling my pants down it fell into the toilet. They gave me a new phone for free after that one. I was in there with my tiny crying baby, and I think the guy felt sorry for me.