Paul said that he accounted all of his many years of studying "but as dung, in order to win Christ.
Sure, I agree Paul counted his earlier years as dung, especially in light of his persecution of the church, including approving of the murder of Stephen. But, he never said his studying, knowledge of the Bible and languages was "dung!" In fact, he listed completely different things, mainly The things he did against the church as worthless! And his fine pedigree! Those were worthless! Read it below.
"If someone else thinks they have reasons to put confidence in the flesh, I have more: 5 circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin, a Hebrew of Hebrews; in regard to the law, a Pharisee; 6 as for zeal, persecuting the church; as for righteousness based on the law, faultless.
7 But whatever were gains to me I now consider loss for the sake of Christ. 8 What is more, I consider everything a loss because of the surpassing worth of knowing Christ Jesus my Lord, for whose sake I have lost all things. I consider them garbage, that I may gain Christ 9 and be found in him, not having a righteousness of my own that comes from the law, but that which is through faith in Christ—the righteousness that comes from God on the basis of faith. 10 I want to know Christ—yes, to know the power of his resurrection and participation in his sufferings, becoming like him in his death, 11 and so, somehow, attaining to the resurrection from the dead." Phil 3:4-11
In other words, all of his human attempts at righteousness, even being faultless before the law -those things were garbage! There is no suggestion that Paul's learning was of no use.
And God certainly did not account those years as wasted. Paul was chosen partly because of his training, and then the Holy Spirit gifted him with much more, especially spiritual understanding.
Paul was the ideal person to take the gospel to the Gentiles. He was even a Roman citizen by birth, which got him out of a tight corner. God chose Paul because he didn't have to teach him languages, rhetoric or hermeneutics! Or many other valuable scholarly things. Paul was the full package. He was God's choice, regardless of whether Paul called himself the "chief" of all sinners. Certainly counting his former life as "dung" is another sign of Paul's ultimate humility, not that his gifts, and learning weren't an important part of his ministry.
The early church valued teaching and training. It was part of the rabbinic tradition. Even women were allowed to learn in the NT! To say scholarship is not important really throws out much of the Old and New Testaments! What was Paul's purpose? Why was he chosen to preach the gospel, as well as teaching doctrine, including obedience to God.
Paul was chosen because he was a trained scholar, even if he realized his abilities were not as important as the leading of the Holy Spirit. Paul's writing ability led him to write most of the NT epistles. His training in speaking enabled him to travel and share the gospel with Jews and Gentiles alike! And those essential items of ministry were learned the old fashioned way.
And again, none of us are Paul! God had Paul write many things, so we can read it in the Bible. To compare yourself to Paul and say, "I only need the HS!" Which Paul even never said, is the height of arrogance.
We won't even get into folks like you who declare the HS taught you, when your theology is so far out, so wrong, it is beyond left field. When you come up with some new theories, 2000 years after Paul wrote basic theology in the words of the Bible, is to say the previous history of Christianity has always been wrong. The fact is, we need to all be humble students, to understand what has gone before, and our part in participating in God's work on the earth, as we await the return of Christ. (once!)
Even your totally misusing Phil 3:8 is yet another sign of your confusion and inability to correctly interpret the Bible. Context counts!! Don't just make up stuff, and then try to present it as truth! You're another person who could really benefit from a course in hermeneutics, and learning how to correctly divide the Word of God!