To say the least, I have very strong doubts about polyamory as a social institution worthy of official and/or legal endorsement. But you are absolutely right that freedom means the ability to live as you choose. Forcing people who understand that they are psychologically unsuited to monogamy into a monogamous relationship is a formula for unhappiness and/or a failed relationship. The real problem is the inability of many people who are polyamorous-clearly not you-to speak openly to a potential partner about their needs. I doubt that a polyamorous relationship could be a lifetime one. But, unless both parties are invested in it, there is no chance for success.