I do agree with you on multiple points, such as the OP having a reasonable expectation of his phone not bending if he was wearing something as large and loose as dress pants, and that the phone should not be bending permanently from sitting in a front pocket, where over 95% of guys keep their phones.You're talking about not even storing the phone in your pocket and wearing different clothes just for a phone, that's absolute hilarious.
It's not like people reporting bends are sitting with it in their back pocket or wearing pants that cut off blood circulation, the op had dress pants on.
Do you expect people to take the phone out of their pocket all the time? When they sit, when they run, when they go to the store, when they use the bathroom, etc.? I habitually take my phone out when I'm driving sometimes but other times I don't, my phone shouldn't permanently bend from being in my front pocket.
However, it is also not unreasonable for smartphone manufacturers (or consumers for that case) to believe that you will alter some of your daily habits to accommodate a phablet. I realize that at its core, the iPhone 6 Plus is still a phone, something that most people carry around with them all day long in this day and age. But we are talking about a different class of phone. If you were used to driving a midsize sedan like a Mercedes-Benz E350, but then upgraded to a Mercedes-Benz 600 or Maybach 62, you would know beforehand that some things will change: you will need a new garage, you will not be able to find parking in London, you will make wider turns at intersections, et cetera.
Yes, my jeans are now too tight to sit and lean over in if I'm carrying my 6 Plus, so I put the phone in my jacket. And yes, I put it on the table if I am sitting down. Having a 6 Plus as opposed to a regular sized smartphone is no different from owning two different things: there are always tradeoffs. Nissan Leaf, economical, Ferrari LaFerrari, fast. Bifold wallet, fits in any pants, long wallet, more credit cards and room for a checkbook.
The ultimate question consumers need to ask themselves is what device best suits their lifestyle and if they are willing to make certain changes and compromises.