The scripture at Acts 15, not written by Paul, represents one particular contemporary strain of Christian thinking from among those who were conscious of the non-Jewish converts who wanted clarification on doctrine.
Christianity from the start was diversified and full of divisions because even before the invention of the Roman Church, which really did universalise belief through force, there were many sects developing and diverging. What appears in the final Roman selection of scripture in Acts, is an almost democratic mission to sort out a problem of teaching. There is no mention of a supreme authority as there came to be in the fourth century under Imperial Rome.
Rome had absolute control but the leaders of the JW organisation function in a solipsistic bubble, collectively they have Solipsism syndrome.
"This refers to a psychological state in which a person feels that reality is not external to his or her mind". That is; only what we think is right....is right. It includes the inability to see that others could be right with an alternative viewpoint. It is an essential defect for leaders of a religious cult. Democracy in any form is the death of this type of autocratic leadership.
For one hundred and forty one years seeing themselves as privileged members of the governance of the Watchtower, the GB imagine they are the apple of God's eye, the very focus of his attention!. They are a collective of narcissists who are even prepared to alter the Bible to favour their own role as divinely appointed leaders and credit their own work as ordained by scripture.
What hubris!
It can only lead to their downfall.