I see where you're coming from and personally don't think anyone should be offended. In reality though, relationships are so different and so complex that it is extremely difficult to make accurate blanket statements about any category. While it is true that not every marriage is a shining example of partnership, at least (most) married couples made the commitment and that deserves some credit. I have spoken to many common law couples and am yet to hear a compelling reason for not getting married, other than the honest ones who admit "I'm just not ready for that commitment", which validates the argument that it's easier to just live together. Situations where marriage is not legally or physically possible obviously are in a class of their own.