This sort of moral superiority argument for open relationships largely harms the perception of those relationships. It definitely works better for some people,

This sort of moral superiority argument for open relationships largely harms the perception of those relationships. It definitely works better for some people, but it can be a complete disaster for others. The nature of the relationship itself directly spawns challenging situations that can trigger intense emotions and insecurity. Logical people with very high emotional intelligence who have read the latest books on ethical non-monogamy are not magically immune to the difficulties. As an example, I have met a number of people who genuinely are not attracted in any significant way to people that are not their current partner. Forcing those people into an open relationship would only create misery. They simply aren’t interested in anyone else.