I do understand that the Church magisterium does not establish its moral positions by "politics" in the sense of asking the faithful what they think. The doctrine of reception of moral teachings and disciplinary laws is relevant, however. When the teachings and rules have been promulgated, the faithful try to live with them and judge them by their reception of them. If the faithful do not accept a teaching, the magisterium makes adjustments. I think that is how it is supposed to work among Church members. It would require habits of synodality in both the lay people and the bishops. We do not have those habits.
In the US currently, there is the further problem that the Catholic Church tends to want to make Church teachings into civil and criminal laws for the pluralistic society we live in. That is a political intervention. It is contrary to Church teaching of freedom of conscience for all people including non-Catholics and non-Christians. I would welcome any discussion of these questions.