Well, Erich, you missed the point. The point of the verses is that it was Scripture, OT or NT, that leads to salvation and to what is necessary for salvation and growth in that salvation.
Guess you didn’t read the linked article. Paul’s words were written to St. Timothy specifically, not to the congregation in general.
The man of God is one called to salvation and to a place in the body of Christ by the authority of Jesus.
Moses - “This is the blessing with which Moses the man of God blessed the children of Israel before his death.” (Deut. 33:1)
“Then the people of Judah came to Joshua at Gilgal; and Caleb the son of Jephunneh the Kenizzite said to him, ‘You know what the LORD said to Moses the man of God in Kadesh-barnea concerning you and me.’” (Josh. 14:6)
The Angel of the Lord - “Then the woman came and told her husband, ‘A man of God came to me, and his countenance was like the countenance of the angel of God, very terrible; I did not ask him whence he was, and he did not tell me his name…’ Then Manoah entreated the LORD, and said, ‘O, LORD, I pray thee, let the man of God whom thou didst send come again to us, and teach us what we are to do with the boy that will be born.’” (Jud. 13:6, 8)
Samuel - “The servant answered Saul again, ‘Here, I have with me the fourth part of a shekel of silver, and I will give it to the man of God, to tell us our way.’” (1 Sam. 9:8)
Elijah - “And she said to Elijah, ‘What have you against me, O man of God? You have come to me to bring my sin to remembrance, and to cause the death of my son!’” (1 Kings 17:18)
Elisha - “And she went up and laid him on the bed of the man of God, and shut the door upon him, and went out… When Elisha came into the house, he saw the child lying dead on his bed.” (2 Kings 4:21, 32)
David - “According to the ordinance of David his father, he appointed the divisions of the priests for their service, and the Levites for their offices of praise and ministry before the priests as the duty of each day required, and the gatekeepers in their divisions for the several gates; for so David the man of God had commanded.” (2 Chr. 8:14)
St. Timothy - “But as for you, man of God, shun all this; aim at righteousness, godliness, faith, love, steadfastness, gentleness.” (1 Tim. 6:11)
Contrary to the opinion that the “man of God” can be any Christian without distinction, Scripture itself will not allow such an interpretation, insisting that the “man of God” is a figure of authority, either commissioned by God directly through Divine Intervention (such as Moses or the Angel), or appointed by another holder of authority (such as Samuel, David, Elisha, and St. Timothy).
In other words, “man of God” is a title of authority that can in no way be taken upon oneself, but rather, it is bestowed upon a man by a higher authority. A man must be called by God to hold this title of “man of God.”
Paul had to continually defend his apostleship because Jesus called him outside of the twelve. Yet his wisdom from God is the basis of most of the canonized Scripture.
Paul’s calling was extraordinary, and so, in keeping with this, he performed “extraordinary miracles.” (Acts 19:11-12)
Core doctrine is the teaching of who Jesus Christ was and is. It is that simple. There are many differences but no difference on Jesus Christ. Any Christian group holds to salvation in Jesus Christ by his redeeming work, by His passion, by His divinity, by His humanity, and by His resurrection. He was sent by the Father and together they sent the Holy Spirit who testifies to Jesus.
From there many differences arise but remember, Christians in the first century, Jews and Gentiles, looked very different but all held to salvation by faith in Jesus Christ as necessary to be called Christian.
Catholics and Protestants agree that to be saved, you have to be born again. Jesus said so: “Amen, amen, I say to you, no one can see the kingdom of God without being born from above.” (John 3:3).
After our Lord’s teaching that it is necessary for salvation to be born from above by water and the Spirit (John 3:1–21), “Jesus and his disciples went into the land of Judea; there he remained with them and baptized” (John 3:22).
Then we have the witness of the early Church that John 3:5 refers to baptismal regeneration. This was universally recognized by the early Christians. The Church Fathers were unanimous in teaching this.
Clearly, baptism is a core doctrine. And yet, there are those who say baptism is just a symbol, that the “water” is the preached word of God. Which is it? And who’s the final authority?