and that's the thread in a nutshell.
No, it's not. Well, from your side it seems to be. The objective way to look at this thread is that there are multiple sides:
(1) I'm not OK with Nintendo locking content behind the amiibo.
(2) I'm not OK with it, but will feel better if there's a non-amiibo way to unlock this.
(3) I'm OK with it
(4) Not only I'm I OK with it, I'm excited for what the amiibo will do in this game and in Zelda U
(5) People in camp #1, stop whining and deal with it (I'm not making this up, this is the tone in a lot of responses, and one of JoeM86's posts in this thread actually has the words "deal with it" in it).
Personally, I'm somewhere between #1 and #2. The level of Nintendo favoritism in this thread is understandable... but unfortunate. No matter how you look at this, this is on-disc DLC. A similar practice by Capcom with Street Fighter x Tekken got them a massive amount of (justified) backlash here on GAF, at least from what I remember. If it were any of the other usual publishing villains, like EA or Ubisoft, this would also get (again, deserved) backlash and criticism.
But it's Nintendo, so it's cool yo.