Brother and friends
So, according to WT doctrine, we are brothers, right? So, if we are all so-called brothers, that we all have one father, right? If we are just friends of our creator, then we are not brothers.
Next time you meet your elders, ask this question: why do you call me your brother (or sister) if I am just a friend of our God?
It's just an endearing term to make the friends feel closer to one another in the Congregations. The real reason the terms are used is to deceive the OS into a false sense of position.
(Matthew 6:9) “You must pray, then, this way: “‘Our Father in the heavens, . . ."
Or were 2nd Class Christians not to pray this way?
Since God is a "prospective father, then 99.9% of Witnesses are "prospective sons/daughter's". So I suggest the correct address based on the hope of surviving Armageddon and passing the millennial test is, "Good morning my possibly brother to be".
Brothers in arms
Sorry - mostly it's men (brothers) sisters are mentioned only from the platform or in prayer by those who regard women as sisters - or people--most do not
Good old boys club-- yet 65% of JWs are women -- so says PEW Research