The believer's power to discern the truth for himself by the anointing he has via the Holy Spirit is taught here:
Yet John,opened the same letter you quoted by referring the readers to what they had been taught, not what they discerned by their "anointing."
1Jo 1:1-3
That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, concerning the Word of life—the life was manifested, and we have seen, and bear witness, and declare to you that eternal life which was with the Father and was manifested to us— that which we have seen and heard we declare to you, that you also may have fellowship with us; and truly our fellowship is with the Father and with His Son Jesus Christ. (NKJV)
Paul as well told Timothy; "
And the things that you have heard from me among many witnesses, commit these to faithful men who will be able to teach others also". (2Ti 2:2)
So the "bottom line", according to John and Paul, is not the individual's "anointing", it is the apostolic teaching passed from generation to generation by "faithful men."
It is not the "anointing" of the individual that is the arbiter of truth; it is the Church which is the pillar and foundation of the truth. (1Ti 3:15)
Bottom line is, believers do not need someone telling them what the truth is. Each believer ultimately has the anointing to know that for himself.
The evidence provided by observing the results of people's assumption that they have the anointing to discern the truth is the multitude of heresies, winds of doctrine, and the great calamity of the extensive fracturing of the body of Christ into tens of thousands of factions and sects each one of which claims that it alone has the truly true truth and the whole truth and nothing but the truth because it has "the anointing." And every one of the sects was founded by someone who had the arrogance to assume that he had the "anointing" and knew better than the Church which Jesus founded.
It would be laughable were it not so sad a state of affairs; the house of God so irreparably separated against itself that the pagan world sees it as irrelevant.
Considering the tens of thousands of opinions reflected by the multitude of factions, each assuming that they have the anointing to discern the truth, I find your argument less than convincing convincing.
But everyone has a nose, two eyes, two ears, and at least one opinion.
iakov the fool