Pushing for a moment might have been a plausible trick to try. The sudden change, and object rushing towards them might be enough to break their focus for long enough to pull the lightsaber back to you. The key-word here being might. It is a pretty big gamble that has a large backfire if it doesn't work. Also, in the symbolic battle between the light and dark in each of them, a power match is far more satisfying to watch, so as well as it not being the best tactical choice, it doesn't have the benefit of being played for the entertainment value either.
Getting hit with the lightsaber on the other hand would do nothing other than make it closer to the other person. Remember, it would only be going 2x the speed they were pulling it at, so even if their jedi reflexes were not enough to predict and or catch it (which they probably would be). At worst they would get a light bruise, and then proceed to pick up the lightsaber and kill the other person