I respect your opinion, not everyone has identical needs.
The huge success of the Galaxy Note series has proven the worldwide popularity of this model. Smartphone display sizes have evolved while Apple has stubbornly insisted they know better than their customers. A tactic that's worked perfectly amongst the easily influenced complaint masses.
There's nothing wrong with a tiny screen for the casual user that spends time with games and other entertainment. The real advantage is the way it increases Apple's profit margins.
Conversely for the modern day web centric work performed by mobile execs and other power users, Samsung, Google, and Android have proven how valuable a full featured contemporary smartphone is.
Widely denied by the Apple devotees, they'll be eating their words if Apple switches to proper sized displays. Suddenly, just as Apple has proven time after time, iPhones with large displays will be declared magical and world changing.
It's as predictable as good old Apples high prices