Au contrair, we disagree.
If you look to Protestantism and what it has lost without Holy Tradition you find the Real Presence, the Holy Eucharist, the Communion of Saints along with, often, accurate Christology.
If you wish to judge the cost and benefit of Holy Tradition, I think these costs in its absence are immeasurable.
I think your list of what one loses without ‘Sacred Tradition’ is a bit brief, but I thank you for agreeing that they are not found in scripture, unless read in to it.