We get a few of these from time to time; some recent (and one not-so-recent) examples:
Why don't Jedi (or Sith) use the Force to snap their foes' necks?
in the Lord of the Rings why didn't the company sail around mordor and come in the back end?
Why didn't the fighters use force pull/push in the generator complex?
My own inclination is to nuke this kind of question from orbit - in the general case (and I say "general case" because exceptions can, of course, exist), I've a difficult time seeing how they're in any way constructive or useful. It's nitpicking and niggling over plot points, and I can see how questions like this can lead to discussions rather than specific answers.
However, before I start nuking, it seems sensible to throw it to the floor to get a consensus on what others think of questions like this.