[DugFin]

>due to flaws in their reasoning or refusal to consistently apply their own reasoning for personal reasons

That's not the entirety of it. The problem is that these ethical problems exist within a certain societal framework, and that framework is made of multiple overlapping assumptions, habits, traditions, and expectations, some of them contradictory. Two people's axioms might be identical, but they may come to two opposite conclusions over whether these identical axioms apply to a given situation based on how they each subjectively weight the assorted related circumstances. They'll BOTH claim that the other's bad conclusion is due to "flaws in their reasoning", and can still both have perfect internally consistent reasoning for their own conclusion. Ethics isn't physics. There often ISN'T a right or wrong answer, only a variation in assumptions.

[Falling3]

I know that's not the entirety of it. But it accounts for far, far more ethical disagreements than people are willing to admit. I've had a lot of discussions with people around ethics and the use of logical fallacies really can't be understated.