“Corporate sin” is a contradiction in terms.

The Church is the kingdom of Christ.  As all the members of the human body, though they are many, form one body, so also are the faithful in Christ. In order to shepherd the People of God and to increase its numbers without cease, Christ the Lord set up in his Church a variety of offices which aim at the good of the whole body. The holders of office, who are invested with a sacred power, are dedicated to promoting the interests of their brethren, so that all who belong to the People of God, and are consequently endowed with true Christian dignity, may, through their free and well ordered efforts towards a common goal, attain to salvation.

As good shepherds, those with sacred power can only reiterate Christ’s divine command that marriage is indissoluble.

Thinking with the Church means that if we love God, we will keep his commandments.