From your Mona Lisa analogy....
The question then arises, they why do you add to it with writings from the early church fathers, the CCC, and *sacred tradition*????
And why do Catholics says Scripture alone is not enough, not adequate that those things need to be added to it?
You dont see where tradition often came before scripture.
I wonder if you realize that much of scripture is simply
Tradition being documented with text on a page.
For this reason of Tradition in Scripture,
we see, and Worship,
tradition and scripture intertwined, co-existent.
Along with the Apostolic Teaching these three elements,
Sripture, Tradition and Apostolic Teaching
work together very much in a "Trinitarian" relationship-
with the same tri-lateral type of dependency like the Trinity.
For Catholics, these 3 elements, working together,
form the bulwark of the Church.
So you didnt like my Mona Lisa analogy?