While in the Navy, I was assigned to attend a course for unit Legal Officers, taught by JAG lawyers. The opening statement was that, as a lawyer, one must adopt a moral code that usually conflicts with the one he was taught. That did it for me.
Which is to say that I understand why you are in a profession other than the law.
I think its most damaging attribute is that in order to be convincing one must be capable of adopting said defective code internally; effectively it is a form of habituated self-deception.
It's a very dangerous state of mind.