One thing that needs to be mentioned that hasn't been brought up yet is that Harm is not used for Force Lightning. Harm is used for sucking the life energy out of someone like an energy leech or Vampire (without the blood sucking). The power used for Force Lightning is Unleash.
Also, technically, the true Force Push and Force Pull abilities are represented by the Control upgrade for the Bind power which allows you to move a target one range band closer or father away.
I noticed this as well and thats how I play it but one could describe Harm as a lightning like effect if they want.