You are applying a different standard to the office of prophet as it's currently dispensed. The NT speaks of the priesthood of all believers, so the dispensation of the priest has changed, and nobody argues with it. So it is with the prophet, and prophetic revelation in general.
The NT prophet is not required, under penalty of death, to be 100% accurate. Ex: Agabus, a prophet according to Acts 21:10. Take a close look at Agabus' word over Paul here.
Acts 21:10 And as we tarried there many days, there came down from Judaea a certain prophet, named Agabus.
11 And when he was come unto us, he took Paul's girdle, and bound his own hands and feet, and said, Thus saith the Holy Ghost, So shall the Jews at Jerusalem bind the man that owneth this girdle, and shall deliver him into the hands of the Gentiles.
Now watch closely what actually happened:
Acts 21:33 Then the chief captain came near, and took him, and commanded him to be bound with two chains; and demanded who he was, and what he had done.
The Jews didn't bind him, the Romans did. Should Agabus be stoned? He's a false prophet according to the OT.
The truth is, there's a different criteria for prophecy in the NT. All who have the Spirit of Christ may prophecy, and there are different types of prophetic revelation, and there's a difference between the prophetic gift and the prophetic office in the church.
Again, Paul says in I Cor:
1 Corinthians 14:29 Let the prophets speak two or three, and let the other judge.
30 If any thing be revealed to another that sitteth by, let the first hold his peace.
31 For ye may all prophesy one by one, that all may learn, and all may be comforted.
32 And the spirits of the prophets are subject to the prophets.
Why judge the words of prophets? To look for an occasion to stone them? That doesn't fit with NT revelation at all. In v.32, he also says that the way it comes forth is subject to the authority of the prophet's humanity. You are going to get a bit of the prophet's personality mixed with the revelation itself. One must be careful to minimize this.
In the end, we are all believers who see through a glass darkly. We all struggle to filter out what comes from the flesh vs. what comes from our quickened spirit. And uderlying it all, prophecy operates by faith through GRACE. Grace permeates everything in the NT reality of God, including prophecy, and the manner in which we receive it.
Well said. Thanks.