Sayings like those are aspirational rather than being realist or simulationist, and they're supposed to be aspirational.
They're stories, just like all morality. It seems when cultures get to a certain point in dissolution you have a growing population that have difficulty drawing lines between stories and reality, what stories are *for* in the first place.
Having aspirational moral systems is critical for a hyperdeveloped mostly-democratic society. It creates a gap between the Best Of Us and the Worst Of Us, and thus suggests a vector. When that aspirational system fails - whether to cynicism or brutality or both matters little - you have a societal collapse incoming or under way.
One depressing example was the progression of the United States' moral judgement on torture during the 21st century. During the worst of the Cold War years I have very few illusions that torture was occurring - extremely imaginative variants in fact. Everyone knew what happens in bush wars - we had quite a few veterans who remembered very clearly. But if in 1963 someone self-identified as a torturer, or recommended we just do it in the open, the same persion would be roundly (and justly) castigated[0].
After 9/11, the idea surfaced that yes, we're going to torture, and yes, it's ok to do it. We accept the "realism".
To see the impact of this, well, I could point to a police officer in 1992 and then to a police officer in 2022. I could also point to an Action/Adventure TV program of the 1980s - say, MacGuyver - and then point to an Action/Adventure TV Program of the 2000s - like, say, 24. Imperial Boomerang is a real thing, turns out, and now we all get to be Fallujah.
In reality, though? The answer to Scalia's "Shouldn't Jack Bauer torture a guy to save Los Angeles?" was always rhetorical[1], but if you took the bait, the correct answer was always, "No", because it destroys the aspirational vector that defines our society. Or, more practically, if for no better reason than the fact a SC justice is legally reasoning from a television show.
[0] The mixed reaction to incidents like Mai Lai show how deep this division went. Not all of America thought it was a terrible thing, but we decided we were made of better stuff. Or we wanted to be, which as it turned out, also important.
[1] The "ticking time bomb" hypothetical which is almost always presented as a stack of epistemic certainty but which is actually unfalsifiable.