Joh 14:26 But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
Joh 16:13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
1Jn 2:27 But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him.
Rom 10:14 How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?
Act 17:11 These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so.
Jas 1:5 If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.
People knowledgeable in the word of God is beneficial to tell people about the word of God and the Gospel of Christ so they will know.
And to preach about the word of God.
But the Bible says to search the scriptures to make sure they are telling you the truth.
Which the preacher does not get more wisdom from God to understand His word more than anybody else for everybody can have the same wisdom.
The Bible says we need not that any man teach us so after we hear about the word of God and the Gospel of Christ we can study the word of God and understand the same thing as the greatest of preachers without being taught by a man.
For what would make them more special to understand than what a common pew sitter can understand if it is the Holy Spirit that teaches us.
Which some people probably depend too much on what other people say instead of reading the Bible and letting the Spirit teach them.
The Spirit is our best teacher of understanding the Bible and a person can read the Bible and be taught by the Spirit and it would benefit them the most.
No human teacher is going to do better than the Spirit in teaching the word of God to a person.