I'd have to disagree with you on this point.
Here is one of many reasons why:
Acts 17
16Now while Paul waited for them at Athens,
his spirit was stirred in him, when he saw the city wholly given to idolatry. 17Therefore disputed he in the synagogue with the Jews, and with the devout persons, and in the market daily with them that met with him. 18Then certain philosophers of the Epicureans, and of the Stoicks, encountered him. And some said, What will this babbler say? other some, He seemeth to be a setter forth of strange gods: because he preached unto them Jesus, and the resurrection.
19And they took him, and brought him unto Areopagus, saying, May we know what this new doctrine, whereof thou speakest,
is?
20For thou bringest certain strange things to our ears: we would know therefore what these things mean.
21(For all the Athenians and strangers which were there spent their time in nothing else, but either to tell, or to hear some new thing)
22Then Paul stood in the midst of Mars' hill, and said,
Ye men of Athens,
I perceive that in all things ye are too superstitious.
23For as I passed by, and beheld your devotions, I found an altar with this inscription, TO THE UNKNOWN GOD.
Whom therefore ye ignorantly worship, him declare I unto you. 24God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands;
25Neither is worshipped with men's hands, as though he needed any thing, seeing he giveth to all life, and breath, and all things;
26And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;
27That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:
28For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring.
29Forasmuch then as we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man's device.
30And the times of this ignorance God winked at; but now commandeth all men every where to repent: 31Because he hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead. 32And when they heard of the resurrection of the dead, some mocked: and others said, We will hear thee again of this
matter.
33So Paul departed from among them.
34Howbeit certain men clave unto him, and believed: among the which
was Dionysius the Areopagite, and a woman named Damaris, and others with them.
Paul's spirit was stirred when he saw the city wholly given to idolatry, and, THEREFORE, he disputed with these people in the synagogue and in the market daily. Part of his disputations included dealing with their superstitions and ignorance, and he clearly called them to repent in the light of a coming day of judgment after dealing with the same.
As Christians, we're called to be co-laborers with God, so we should never assume that the Holy Spirit does not need our help in relation to bringing the conviction of sin upon others. Some of us plant, some of us water, and then God alone can give the increase, but his increase is in direct relation to what has previously been planted and watered by men.
Jesus is the one who commissioned us to preach repentance. How can we tell people to repent without first informing them what they need to repent of?
Again, it is the sick who need a physician, and most people think that they're perfectly healthy, spiritually-speaking, when they're anything but the same. God's law brings the knowledge of sin. There's nothing wrong with using it in our preaching as an introduction or forerunner to the grace of God.
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