Catholics are required slavishly, blindly, and mindlessly to follow every utterance and every whim of every bishop and Pope! How dare you not conform to my Jack Chick version of what sort of "obedience" and "submission" are required by the Catholic Church?
You tried that mere assertion of hyperbole before, which is a poor substitute for the lack of an argument against the actual material that substantively refutes your assertion that the encyclical of the pope had nothing to do with the Catholic faith, and that no assent is required to such.