Three words, in German if I may. Der Synodale Weg.
To claim that there is no attack on the Church's teaching on sexual morality is being obtuse.
That the Church has a fallible human element is denied by no one. But to claim the Catholic Church is a mere human institution is to deny the very basis of Catholicism itself. The claim of the Catholic Church and the very basis of its claimed authority is that it is a divine institution founded by Christ. That God Himself has guaranteed the Church immunity from error in regards to divine truths.
If it has erred in faith and morals then the Church has defected. If the Church has defected then the entire edifice of the Catholic religion crumbles.
Scripture is not silent. 1 Corinthians 6:9-10:
Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind. Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.
Of course, one can always play word games and rationalize away clear scriptural teaching. Which brings to mind. 2 Timothy 4:3
For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears.