This does not square with especially Apple's unending obsession to make phones as thin as possible. Which is doubly stupid when it makes them so fragile that the first thing you do after taking it out of the box is to wrap it in a thick rubber shell.
What obsession about making thin phones? iPhones are pretty thick and have been that way for years. The Air being an outlier, of course, but it's an intentionally thin phone in a lineup of thick and heavy ones.