This is an enormous red flapping flag for codependence. Hard for many people to see because this way of thinking gets so much applause from others. But if you really stop and reflect on this way of thinking, constantly putting the wants of others above your own, it does not lead to a peaceful, happy, calm and fulfilling home. It leads to guilt, resentment, drama - lots of wondering what went wrong. There are many giant red flags for codependent thinking, but this is one of the biggest.accustomed to putting others wants above their own.
My view and my experience is that there's the same ratio of codependent vs. healthy independent thinkers in monogamy and polyamory. Emotionally healthy relationships have zero to do with the relationship model. What makes a relationship harmonious is the health of the individuals involved. Any time a person knows their own individual values and stands by their own individuals values without apology, that person will attract another who is equally clear about what they want. Harmony happens when two self-aware, healthy thinking individuals come together for a shared experience based in shared core values, including a shared core value of the relationship model. The particular relationship model is completely irrelevant.