One more point in addition to the other comments here: Whenever topics like Apple come up (as in your example), a lot of people for whatever reason are instant

One more point in addition to the other comments here: Whenever topics like Apple come up (as in your example), a lot of people for whatever reason are instantly emotionally involved (either that, or it attracts the emotionally involved ones). I believe the emotional involvement prevents a lot of productive discussion from happening. Choose nearly any other topic and I would overall expect better discussion and less apparent subjectivity.