Not commenting about the ic/leo part specifically, but there is a pretty abundant body of work on what "normal" people are willing to do, as long as they find a way to rationalize it away. The banality of evil is well documented.
In that light, what others would do is rarely a reliable indicator that you shouldn’t think twice about your actions, lest you regret later, once the thinking has happened.
I have no idea what any of this has to do with anything I just wrote, I'm sorry.
I was commenting on your point that a pretty substantial fraction of normal people find some actions decent, and even praiseworthy.
My point is that this fact shouldn’t belong in a discussion about ethics, given how often widely held moral positions have come to be a source of regret.