Every guy I know puts their phone in their front pocket. Who the hell wears fanny packs these days? Belt clips? Maybe for a Blackberry in the 90s. Purses? Sure, if you have a vagina between your legs.Thats the problem. A phone is rigid, your pants are not, they are made to bend with your body. IE... why in the hell would you put a large electronic device in your pants, front or otherwise and site down?
If someone can show that Apple has advertising of these phone depicting people putting the phones in their pockets then maybe you have an argument, if they sit down in the commercial then yes, that would be a great argument. Or documentation that shows pants pockets as acceptable storage for your iphone
Point is simple:
1) A huge userbase should be expected to put phones in their pockets
2) No other major smartphone we are aware of has this weak point 2/3rds up the frame that bends unusually easily
3) Apple won't even admit their phones are fragile, and warn people "hey this is way more fragile than most smartphones, use caution or buy a case to reinforce the flimsy chassis" and in fact instructs their employees to tell consumers their phones don't bend.