That's an interesting point, however, you're inferring that all people who commit crimes must be polarized darkworkers but I don't think that's true. I think there are a lot of greyworkers and even lightworkers that can commit violent crime without realizing what they're really doing, and surely all could experience empathy at some point.
Also, I'm not sure what you mean by your quote "if a lightworker is not highly polarized, they'll find it very hard to use negative emotions to create change in somebody, even if they think it is in everybody's best interest. Even a moderately polarized darkworker will have no trouble using negative emotions for personal gain."
I don't understand, are you saying that a lightworker could not conquer over the negative emotions of someone else? I think a lightworker could definitely use positive emotions to conquer over negative ones, it all depends on perspective.
Anyways, though you bring up a good point, what I'm trying to say is, even if a darkworker has no empathy, if they were able to be shown through logic and rationality that their means of serving their self-interest would be wholly detrimental to them in the long run, then wouldn't they choose to conduct themselves in a manner which would be most beneficial to them, and therefore cease conducting through those means?