Frankly I would love to know what your definition of the term "gameplay" is because it seems unique. To me any interactive medium contains gameplay mechanics, even point-and-click adventure games do, hell even some BluRay menus could be described as having "gameply."
I even think Google's easter egg "zerg rush" (google it!) is a game and has gameplay.
I'll put it succinctly: The main source of fun in minecraft (without mods) is the same as the original creative mode. Creative mode is a pure building-blocks toy and not at all a game. The parts of minecraft that you can call a game are unimportant compared to what's actually fun.
That said, you can always play Creative mode and/or Peaceful difficulty if that's your style.
I don't care that you don't like a game, but you're wrong and should feel bad. :p
I do like minecraft, but the idea that the end screen represents any kind of progress wrt what you spend 95% of your time doing is ridiculous.
'hell even some BluRay menus could be described as having "gameply."'
Which should be a pretty sure sign that "can be described as having gameplay" isn't that meaningful.
(The problem with arguing semantics on the internet is that everyone starts obsessing about technicalities. Quake, SimCity, Minecraft and Blu-ray menus, all qualify as technically being games. And so technically qualifying as being a game is clearly irrelevant to anything interesting. It is obviously not what people usually mean by "is it a game?" and such.)