You are quite wrong:
Romans 15:20
It has always been my ambition to preach the gospel where Christ was not known, so that I would not be building on someone else’s foundation.
1 Cor 1:17
For Christ did not send me to baptize, but to preach the gospel—not with wisdom and eloquence, lest the cross of Christ be emptied of its power.
Acts 5:42
Day after day, in the temple courts and from house to house, they never stopped teaching and proclaiming the good news that Jesus is the Messiah.
ibid. 8:4-5, 12, 25, 35, 40
Those who had been scattered preached the word wherever they went. Philip went down to a city in Samaria and proclaimed the Messiah there.
But when they believed Philip as he proclaimed the good news of the kingdom of God and the name of Jesus Christ, they were baptized, both men and women.
After they had further proclaimed the word of the Lord and testified about Jesus, Peter and John returned to Jerusalem, preaching the gospel in many Samaritan villages.
Then Philip began with that very passage of Scripture and told him the good news about Jesus.
Philip, however, appeared at Azotus and traveled about, preaching the gospel in all the towns until he reached Caesarea.