Your argument, common among Protestants, that one doesn't need teachers because one simply gets all one needs to directly from the Holy Spirit, is not really convincing. We can judge it by its fruits, it leads to a bunch of people saying contradictory things and claiming to get them from the Spirit like it's "using the Force" or something. It leads to gobblygook, and more vitally, it leads to prelest. Human beings are far from perfect and infallible, but that doesn't mean you can consider yourself above them and think yourself to be a prophet unto yourself. Christ is sending the Spirit to HIS CHURCH, and the Church keeps a uniform understanding. Once your out of it, teachings start to completely contradict and splinter, and that is why the Protestant claim that a cacophony of sects are "one Church" is so ludicrous. If you were one Church, you'd have one voice, one doctrine.
One need not argue no need for teachers, only to refer to the scriptures which evidence such things, by statement and by example. In Jhn 2:27 it tells that they that have received the anointing from him needed not that ay man should teach them. Let it be demonstrated, who taught Abel, Enoch, Noah, Abraham, Isaac, Jacob, Job, Joseph, Moses, Elijah, Daniel, John Baptist, and others unto whom the Word of the Lord came. It was the Word of the Lord, which Paul wrote was in the heart and mouth by which they might be saved in Rom 10:8-11. Again, to the Hebrews it was written whereas they should be teachers, they had need another should teach them. It is plain, those who are unskillful in the word of righteousness, and have need of their senses to be exercised to discern good an evil may need teachers. This is the cause of the divisions, spirits without discernment; they who have need to be taught think to teach, and they who are teachers from God, are hardly found, Catholic or Protestant. It is plain that so many divisions came up under teachers, and among those who had scriptures. Over those who are the most highly esteemed among men, there can hardly be found an earthly teacher, as those names written above and others. Who taught Samuel, and David? Indeed, we should know by fruit. If the Catholic church, which is the largest and richest church in the world were God's church the world would be filled with righteousness. Catholics would be a sweet smelling savor to God, and a rebuke to the world. But the Catholic church is as the world is, and knows as little about scripture as so great many among the protestant demoninations, and are as sinful as any among the denominations. It was the Catholic church that taught of the scriptures in Latin for some time, keeping people ignorant of the scriptures except by hearsay. It was the Catholic church that was at the helm of some of the persecution and murder during earlier times in Europe, as the journals and memoirs of some will tell. It seems to me that there is as much corruption among the so-called catholic church as there is among the protestants. It is said there are about 1.6 billion catholics, and only 800 million protestants in the world. There being about twice as many catholics as protestants the world ought to be a much better place. There being approximately 2.4 billion between Catholic and Protestant, out of about seven billion people, the world ought to be well salted, but alas it is not.