I have to admit I like the way she approached the article and I find I like the way many writers that don't have a big "Poly" banner attached to their side.
Straightforward and simple. Monogomy is simply not the only CHOICE - or even the best one in many circumstances.
If that simple fact was taught & accepted - in say 8th grade - we'd have a lot less "cheating", broken homes and general disaster. it would be a topic that needed to arise almost on a first date with anyone and certainly after any relationship had been established for long enough to get in a "rut".
Simple is best. SO is honesty.