I can't believe you would be trying to imply it doesn't happen, but see post #23 in the other thread from today vs post #22 at
https://forums.macrumors.com/threads/1750799/ I'll just assume you are new here. Else, I find it hard to believe that anyone could be around here for a while and not notice the flip flopping opinions the just follow whatever Apple rolls out. But there's your one example. If you need more search back for 4" rumors pre-launch to see so many posting exactly what I referenced and then all that negative evaporating as soon as Apple rolled out the 4"
or search back for endless justifications of the lack of a front-facing camera in iPad 1 ("stupid", "why would I want to video chat on an iPad", "stability", etc) flipping to the gushing "must have" love for FaceTime on iPad 2
or search back for endless posts about "720p is good enough" when Apple clung to that max in

TV 1 & 2 but then that whole argument evaporated when

TV 3 rolled out, never to be seen again
and so on.
This particular topic is going to be an ultimate example because there are years of posts attacking the "abominations" of screens larger than 3.5" and then 4". "Stupid", "I'd never buy a phablet", "if I wanted a tablet, I'd buy an iPad" and on and on has been slung in countless threads for several years that the other guys have sold phones with screens > 4". Apple is about to roll out iPhones with screens bigger than 4". Conceptually, the entire group who has found such fault with screen sizes >4" should not buy. But let's see what happens. And then let's see what they are saying about those "abomination" screen sizes after "shut up and take my money".
If iPhone 6 will be 4.7" and 5.5", I can easily envision the new abominations will be >5.5" and < 4.7". 4" and smaller will start getting called puny and similar. >5.5" will be far too big and unmanageable, "I really will need new pants pockets", "stupid", etc.