This may be accurate for some, but definitely not all. I use my 5s as much if not more than the next guy.I read all the post again and those who complain seem to not use a smartphone as a computer but more towards a traditional phone. Those who are 4" iPhone crowd should just buy a 5S and an Apple watch for ApplePay and call it a day! These two products provide the small iPhone buyer with everything they need.
The reason they don't want a larger iPhone is they don't use it for media consumption: reading online, gaming, podcast, YouTubing, etc... No desire for bigger screen.
Actually more appropriate phone would be a flip phone.