Movies aside, I couldn't agree more on your left/right analysis.
Why is it that everything must fall into one of the predesignated groups. Gun Rights, Religion, Abortion, the Middle East wars, Gay Marriage, etc... if you favor small government and lowered taxes leaning towards a laissez-faire approach, then you you're obviously a righty. As such, you must be a gun nut who feels abortion is a crime against humanity, and you love the wars, you hate gay people and love Sarah Palin. Or, you're an oil tycoon.
And if you favor a larger government with more oversight and higher taxes to pay for subsidized programs like universal health care, then you are obviously a lefty. As such, you are a gun hating communist hippy who loves abortion, is probably gay, and lives on welfare.
Repeat as nasuem for whatever other stereotypes you like
sigh
To quote, well, you: "This. Madness. Has. Got. To. Stop." (also facepalm x7)
Going back to movies: Not every movie needs to be good. In fact, I would argue that bad movies make the good ones even better. Just like bland food, bad sex and ugly clothing can make you notice the good variants thereof. If every movie you saw approached "masterpiece" level, it would cease to hold meaning.
That being said, I think our line up of bad movies needs to get better. I'm all for an occasional silly romp, talking dog movie or explosion extravaganza. It's nice sometimes, when you can miss 5 minutes of a movie, and not be completely baffled as to what's going on. But that shouldn't give studios a license to pump out absolute garbage. I shouldn't be forced to say "wtf am I even looking at? OH GOD MY EYES. What are you doing to my eyes," as was the case with Human Centipede, and both Transformer movies.