[maverick2007]

I feel like the author starts from a position of poly being the "right" way to conduct yourself and worked backwards to deduce a reason why their school of thought is right and monogamy is wrong.

Couldn't you make the same argument the other way if you assume that monogamy is "right": "poly people are insecure in thinking that no one would commit to them and only them and they choose to act accordingly to that principle instead of working on themselves"? Of course there are poly people that are like that just like there are monogamous people that want to control/are jealous of their partner but I don't think either are as good of arguments as the author thinks