Yes, and accidents aren't a design flaw...these phones aren't melting and warping by gentle pressure...it takes some serious force. Sure, the phone may have just been in your pocket, but you need to be aware of the forces you're exerting on a device in your pocket. Lean up against a hard edge? That's a LOT of force. Bend over when the phone is beyond the pivot point of your leg? A LOT of force. Have the phone go sideways on you and sit down, pulling both ends against your femur? Again, a LOT of force.
When I was making sure I wanted the 6 and not the 6+, I used those cutouts, and I could see easily, that a 6+ in my regular jeans pocket would put crazy amounts of force on the last inch of the phone if I bent over while sitting. I can theoretically fit my iPad Mini in my front pocket too, but if I sit with that thing in there, I'm going to mangle it to heck. It's common sense.
I shattered my 5S when it fell out of my pocket and landed perfectly flat on the back on concrete. It was a short fall, but the circumstances were perfect to put a crazy amount of force through the screen (absolutely no tumbling...it landed perfectly flat and didn't even move after landing)....and of course the glass shattered. I wasn't mad at Apple...it was a) my fault for not making sure it was fully in my pocket and b) bad luck from hitting the ground in just the right way to shatter it. Would have happened with most any glass device.