What you are describing is not primacy of conscience. Here is the Catechism on the subject:
vatican.va/archive/ccc_css/archive/catechism/p3s1c1a6.htm
Self-examination must be done with enough humility to recognize one might be wrong. If one is at odds with one’s bishop, priest, Pope, or the Church). Such examination must lead to a continuation of formation. I love this quote from St. Augustine:
We can say before God that we truly are trying to discern truth, or prudence, or whatever it is we are contemplating. I get the impression that many here have their opinion and have no interest in digging deeper. Well, that makes sense if this is not an important issue for you. But when I see people talk of abandoning their faith over this, then I question if the role of conscience is properly understood. The Church is not even done with Amoris Laetitia, and I assume all posting here are not done with their life time of formation.
On a personal level, though Amoris Laetitia’s footnote does not affect me, the issue has been one that I have always found difficult, and was discussing it here long before this development.