I dont like the text. Self control and love dont mix that well (for me). Also telling people they should not be polyamorous as if thats a choice for everybody is just not how that works for everybody.
Let me tell you, if you can’t exercise self-control, then there’s no way you should be polyamorous. All that lies down that path is pain, bad behavior, heartache, and disappointment.
I dislike the term “self control” because “you” are never in “control” - thoughts and actions are the result of prior events that made your brain the way it is. You didn’t design yourself.
Still, you have to get along with others to survive - you act a certain way already. Persumably everyone can improve to get along with more people.