Shall we split hairs on ‘how’ God got his message to us? Rather how about the message sent...about and to whom? That way at least we know if there’s agreement on the foundation of what the rest is built. If there’s no agreement there...then nothing else will mesh...pro con or otherwise.
It is not splitting hairs, it is a matter of authority.
I accept that the Church is led by the Holy Spirit, as promised by Jesus and therefore, accept her authority in matters of Scripture, Tradition and Faith.
I have said many times that I believe salvation is a gift of the Grace of God, through the sacrifice of His Son, Jesus and by no other means. It is what the Church teaches.
When one disputes that that is what I believe because I am a Catholic, it is not splitting hairs, it is claiming an authority which has not been given to them, by Christ or by the Scripture and a knowledge of my heart which only God has.