THIS IS TECHNICALITY, and a valid one, but no JW will accept this practically:
Young people who have been raised as Jehovah’s Witnesses do well to examine whether their Christian identity is becoming stronger based on a personal relationship with God. They cannot depend merely on the faith of their parents. Regarding each servant of God, Paul wrote: “To his own master he stands or falls.” Thus, Paul continues: “Each of us will render an account for himself to God.” (Romans 14:4, 12) Obviously, a halfhearted continuation of family tradition cannot sustain an intimate, long-term relationship with Jehovah.
Throughout history, there has been a succession of witnesses of Jehovah. It extends from the faithful man Abel—about 60 centuries ago—to the “great crowd” of modern Witnesses and on to throngs of worshipers of Jehovah who will enjoy an endless future.
WT 2/15/2005 page 16, pars. 16-17
Jesus wants all his disciples to be faithful, zealous witnesses right down to the very end of this wicked system of things. “This good news of the kingdom will be preached in all the inhabited earth for a witness to all the nations,” said Jesus, “and then the end will come.” (Matthew 24:14; Acts 1:6-8) In both what he did and what he said, “the faithful and true witness” was an encouraging example for true Christian witnesses of Jehovah today. They recognize their grand privilege as upholders of the divine name and loyal servants of Jehovah who take to heart his words: “You are my witnesses . . . and I am God.”—Isaiah 43:10-12.
WT 6/1/84 page 22, par. 8
So although the scripture is specifically applied to anointed, the WT paints all followers with a broad brush as "witnesses."