You are talking about a completely different type of failure here and your reasoning does not apply to this subject, sorry.
Oh OK if you say so I trust you.
But let me ask you how come it is almost entirely the end bolts that break? The center ones get just as much tensile stress but I have never seen one of them break and I have replaced 100s of them, the sideways movement is much greater at the ends than at the center, I am sure tensile forces play a part also but that side to side is what finishes them off.
