On your first point, I agree, especially when the title is "Pulp Fiction." Careful fiction writers do, however, try to tie up loose ends and avoid inconsistencies where possible. This helps in the so called willful suspension of disbelief, that feeling of losing yourself in a book or film.
On your second point, respectfully I must disagree. All too often, Hollywood interjects political messages into films, where they have no purpose in the plot other than to accomplish social instruction.
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So what if it may be slanted? You can't listen to alternate opinions? Athenians who invented the theater and drama and camedy made it a point to confront the demos.
Has there ever been a less political filmmaker than QT?