Hi Carvin
We use the written word to support the truth we have found in God's word the bible but everything we believe has to be backed up by bible command, scripture or established and applied bible principles.
You are talking like using the written word is wrong? huh!!! Jehovah established it's usage by inspiring the Bible, using printed words as a way to teach us himself and the Bible writers clearly sent letters that didn't make it into the Bible as part of their everyday functions among the congregations.
Colossians 4:16
After this letter has been read to you, see that it is also read in the church of the Laodiceans and that you in turn read the letter from Laodicea.
2 Corinthians 10:11
Such people should realize that what we are in our letters when we are absent, we will be in our actions when we are present.
There is no biblical precedent to assume we are not allowed to write encouragment to each other. The important things is we recognise the only inspired writing is the Bible. We have never claimed inspiration for the written tools we use that help explain the bible.
Explaining the Bible is what we are supposed to do as God's people.
Acts 8:30-31 (New International Version)
30 Then Philip ran up to the chariot and heard the man reading Isaiah the prophet. "Do you understand what you are reading?" Philip asked.
31 "How can I," he said, "unless someone explains it to me?" So he invited Philip to come up and sit with him.
Why is much of what you bring up against witnesses just different ways of actually stopping them doing things well established in the bible?
Btw Using the word "Cult" is just a strawman used as a defamatory word to prevoke a negative response. Nowadays people can just cold read any structured group you like into it. In early times they used the word "sect" like this and Paul openly recognised but just shrugged the negative connotation off.
Acts 24:14
However, I admit that I worship the God of our fathers as a follower of the Way, which they call a sect. I believe everything that agrees with the Law and that is written in the Prophets,
Please recognise the well-used strawmans from this site and the negative response they try to provoke without proof simply just assuming wrongdoing.