Exactly.
What I find contradictory, is that many years ago (before external power use), some pilots used the excuse "why should we care about fuel efficiency if they leave the APU running all night". Ok I understand your point of view.
Yet now when they are using ground power to avoid the APU running all night, some pilots still don't care. They long forgot their original excuse about blaming the company for running the APU all night and still don't try to operate efficiently as a professional even when the company is making an effort.