So many plot holes and logic problems in the SW fillms can be solved with the following truth: Its a movie, and it looks cooler to do it that way.
Lightsaber battles look incredibly more cool than two guys pointing at each other with constipated looks on their faces.
I'm a huge EU fan, and I like to figure out why certain things are done certain ways, and how sci-fi tech works and all that...but for you canon spouting "movies are the only truth" folks out there, youre gonna find that "it looks cooler that way" explains almost every illogical thing Lucas does.