That’s the idea. The Church as Christ’s church on earth is infallible, thus in those issues of faith and morals it can’t change - even by a Pope. I sou;don’t crow about the faith that grew in the 16th century from the desire to divorce (Henry VIII) or marry (Luther, who instituted civil divorce), or become his own Pope (Calvin) or reject the sacrifice of the mass utterly, despite the first Christians insistence on it (Zwingli). I would say pray for the synod as the good Bishops holding up for the truth of the Gospel are in danger. As for the history of protestants, civil divorce is business as usual almost all of its 30,000 branches.
God is infallible when He speaks on matters of faith and morals and He tells us what that is in Scripture.
We don’t need someone to come along and say *Murder is wrong* when God already declared it wrong.
What matters of faith and morals is the RCC going to pronounce on that God has already not declared to us already?