As an aside, the video that really demonstrates how easily iPhone 6+ can bend is this one: https://www.youtube.com/watch?v=gJ3Ds6uf0Yg
Seems to have been bent with considerably small effort, and very quickly.
Seems to have been bent with considerably small effort, and very quickly.
Not all phones take the same pressure. But the iPhone 6+ is hardly the weakest of the lot. Consumer Reports lists it as more durable than the HTC One (90 lbs for deformation of the 6+ vs 70 lbs for the HTC One), and I don't think the HTC One is generally considered to be a flimsy phone (Consumer Reports actually says it's "largely regarded as a sturdy, solid phone").
So, if you apply pressure to the right (wrong) part of the phone, on purpose or accident, it will snap like a twig. That's just reality. Deal with it.
That said: if you are more interested in using your 6 Plus than in bending it, buy a rigid case. Problem solved.