How does the Catholic, Baptist and Pentecostal denominations justify the practice of following teachers given this in scripture?
"But the anointing which you have received from Him abides in you, and you do not need that anyone teach you; but as the same anointing teaches you concerning all things, and is true, and is not a lie, and just as it has taught you, you will abide in Him.", 1 Jn 2:27
"No longer will each one teach his neighbor or his brother, saying, ‘Know the Lord,’ because they will all know Me, from the least of them to the greatest.", Heb 8:11
Obviously, they are appointed in the Church:
"And God has placed in the church first of all apostles, second prophets, third teachers, then miracles, then gifts of healing, of helping, of guidance, and of different kinds of tongues.", 1 Cor 12:28
Then, apparently "you" should be teachers at some point,
"by this time you ought to be teachers", Heb 5:12
If you back up to Heb 8:10, this is largely acknowledged as the New Covenant where the Holy Spirit is given to dwell within believers transforming their nature to keep God's ways:
"This is the covenant I will establish with the people of Israel after that time, declares the Lord. I will put my laws in their minds and write them on their hearts. I will be their God, and they will be my people.", Heb 8:10
That appears to be the anointing in v11. And, that anointing says you have no need of a teacher. So, why do the denominations justify their followers remaining under teachers, most their entire lives in the church?
Here's a New Testament example of how to conduct "When you come together":
1 Cor 14:26-39, and some points:
"everyone has a psalm or a teaching, a revelation, a tongue, or an interpretation.", v26
"Two or three prophets should speak the others should weigh carefully what is said. And if a revelation comes to someone who is seated, the first speaker should stop", v29-30
For you can all prophesy in turn so that everyone may be instructed and encouraged", v31
"If anyone considers himself a prophet or spiritual person, let him acknowledge that what I am writing you is the Lord’s command.", v37
The above is quite different from conventional church services.