Of course you are welcome to believe that the Society Mass does not fulfill the Sunday obligation, but those who speak for the Pope disagree. It most certainly does, with caveats, of course.
Thinking logically, they most certainly do have the right to express the point of view that the deficiencies of the NO Mass are dangerous to the faith of the Faithful. As Bishop of Campos in Brazil, Msgr Castro de Mayer retained the Mass of all time in his Diocese up until his retiremenr, and he refused the NO Mass. The NO Mass was offered by only a couple of the Priests in his Diocese, with the Bishop’s blessing.
Your opinion is certainly valid, and is valuable. But the opinion of the Ecclesia Dei Commission does carry more weight. One is able to fulfill one’s obligation at the Society Masses, provided one does not do so with the intention of separating onesself from His Holiness, and of course the Ecclesia Dei Commission does not recommend attendance. But they have made clear that one does fulfill one’s obligation, and if one is so moved, to contribute modestly to tyhe collection.