Apostolic Exhortations like Amoris Laetitia are issued after representative bishops of the world have met together to discuss the topic. This Exhortation follows two synods, booklength publications on the topic, and much discussion hroughout the world. Their summation of the discussion became the basis for this Exhortation.

IOW, Cardinal was already set against Cardinal, bishop against bishop, on these topics. It would have been inappropriate for Francis to present their discussion as if everyone was in agreement the whole time; they were not then and so they are not now. In asking the dubia, these cardinals are insulting the Synod, who listened to them yet could not to decide this issue.

AL contains the response to these cardinals in paragraph 3, stating that not every issue needs to be decided by an edict from Rome. It makes you wonder if they read that far into AL.