I was asking what was the message you were trying to tell in the original post? Were you saying that preaching the gospel to unbelievers is a foolish thing to do? Or were you saying that preaching a false gospel is foolish? Or something else?
The title is taken from Paul's teaching.
1 Corinthians 1:
18 For the message of the cross is foolishness to those who are perishing, but to us who are
being
saved it is the power of God.
19 For it is written: I will destroy the wisdom of the wise,
And bring to nothing the understanding of the prudent.
20 Where
is the wise? Where
is the scribe? Where
is the disputer of this age?
Has not God made foolish the wisdom of this world?
21 For since, in the wisdom of God, the world through wisdom did not know God, it pleased
God through the foolishness of the message preached to save those who believe.
22 For Jews request a sign, and Greeks seek after wisdom;
23 but we preach Christ crucified, to the Jews a stumbling block and to the Greeks foolishness,
24 but to those who are called, both Jews and Greeks,
Christ the power of God and the
wisdom of God.
25 Because the foolishness of God is wiser than men, and the weakness of God is stronger than men.
So you may now ask, how is preaching the cross the power of God?
The OP goes on to show that Jesus teaches in John 16 that the Holy Spirit is tasked with
convicting the world of sin, righteousness, and judgment. Therefore, our confidence is in
preaching a simple message of salvation, and trust in Holy Spirit to do the "heart work".
John 3:16
Is this not sufficient to present God's love to a lost soul?