Pastors should equip and teach the laity to p preach the gospel to the world.
You are not using the word 'preach' in the same way as our Reformed forefathers. They would agree that it was their duty to equip and teach some, but not all, to be approved and called for the function of preaching.
LBC 26: Paragraph 11. Although it be incumbent on the bishops or pastors of the churches, to be instant in preaching the word, by way of office, yet the work of preaching the word is not so peculiarly confined to them but that others also gifted and fitted by the Holy Spirit for it, and approved and called by the church, may and ought to perform it.