Circumstances do not change morality. An easy way to tell true theology from fake, is to apply this rule. If something is A True and Living icon, then it stays true regardless of circumstances. Our marriage vows say In sickness and in health, for richer or poorer, until death do we part. Those of us who hold true to those vows, no divorce is possible due to circumstances.
Recently, Cardinal Cupich suggested that the correct reading of Amoris Laetitia is that subjective conscience is the final arbiter of morality. This leads to Three crises in Catholic Teaching because it removes Catholic Teaching from the realm of objective fact, and substitutes subjective feeling. Archibishop Sample has already anticipated these issues , and his encyclical, A True and Living Icon, is the ultimate antidote to the confused mess that is subjective conscience interpretation on this topic. For this blog, as I get more time to work on it later in the spring and this summer, it is Archbishop Sample's interpretation, not Cardinal Cupich, that is my standard for marriage.