Vatican II clarified the real and definitive place in Church teaching of personal conscience.

We are obliged to follow our conscience, but we are also obligated to correctly form it. As Catholics who have access to the full revelation, that obligation weighs more heavily upon us then it does on others who rely on the law written in their hearts or fragments of the revelation.

There is no dispute about conscience.

The sole question is whether the Church can endorse the conclusions of improperly formed consciences, and in fact do so without regard to the revelation.

The answer, of course, is “no”.