This gets back to what constitutes God’s revelation. Those who hold to Sola Scriptura limit God’s revelation to written communication. Catholics recognizes that He also speaks to us through Sacred Tradition..by word of mouth.
When Jesus disputed with the Pharisees He never, ever, not even once, based His arguments on the traditions that had been built up around the Scriptures. Rather, Jesus quoted the Scriptures every single time—often precisely to dispute and discredit extra-Scriptural traditions. You can point to no higher authority, nor any better example, than that.