Thanks for your question. The thesis of some people is that polyamory, if it were socialy sanctioned, would eventually lead to just a few instances of one man with a harem of women who are not also involved with each other (polygyny or what most polygamy looks like). This would result in all women being in functionally monogamous relationships and only men being truly polyamorous. My comment speaks to that. These people with this thesis are failing to recognize that polyamorous women also often want and have multiple partners themselves, just as poly men do.

In other words, if polyamory were to become a widespread relationship dynamic, both poly women and men would have the same opportunities as well as the same desires for multiple partners. Not everyone wants that, but for those who do, who are used to the variety of companionship, love, and sex that is intrinsic to polyamory, it makes no sense to assert that women only would abandon that in favor of pairing up with just one man (who then gets to have many partners). This has nothing to do with switching between true relationship styles (mono or poly) and refers only to the functional monogamy that those floating this thesis are asserting.