Finally watched Oppenheimer today (it's a masterpiece), and one of the many lines that I loved in the movie goes something like: "Do people need a reason to do good?" Or do what is right. Or speak the truth. I can't remember exactly, but that's the gist.
It was asked after one of the characters expected an ulterior motive from someone who was acting from pure intentions. This assuming character have done unethical things for power, and expected the same from other people.
That one question sums up an ugly truth: that many times, it's much harder to do what is right, and so it is chosen too rarely, when that should be the status quo.
That the normality of manipulation and politicking have made truth, alone, insufficient to be believed.