"We have learned from none others the plan of our salvation, than from those through whom the gospel has come down to us, which they did at one time proclaim in public, and, at a later period, by the will of God, handed down to us in the Scriptures, to be the ground and pillar of our faith."
St. Irenaeus speaks of an oral gospel later written down. In much the same way, his oral teachings are available to us now because he wrote them down. In the absence of a Roman-era Dictaphone, we will only know of oral traditions because they are written down.
If you are opposed to using the Traditions of the Church, you really ought not be quoting the writings of Sts. Irenaeus or Cyril or Gregory, or any of the other fathers of the Catholic Church.
Don't you wish...Irenaus knew the difference between the Holy Inspired words of God put into written scripture and your catechism...A pity you don't know the difference...