A couple of things.
First, I enjoy the movie the way I enjoy STV. Yes it's a bad movie, but I turn off my critical thinking and just enjoy what I can.
Second, if we are going to critical think, is it not possible for a planet to be in Federation Space, but still not be a Federation planet? I want to say that has come up before in TOS or TNG, heck maybe even DS9, I can't remember.