Marriage mates, family members, then anyone one might meet in the ministry….which covers all human beings.
Why limit it to people you meet in the ministry? Why not just say anyone you have opportunity to interact with?
By specifically saying those one might meet in the ministry, Watchtower is giving JWs cause to justify not participating in soup kitchens or offering other kinds of charitable assistance to people other than preaching to them.
What I mean is this. If a more reasonable and genuine JW were take a Saturday off from the ministry to volunteer at a soup kitchen and another JW later asks him why he didn't see him in service Saturday, the conversation could go something like this:
Watchtower JW: Hey, I didn't see you out in field service last Saturday. Were you sick?
Noble-Minded JW: No, not at all. I just took a Saturday off from field service to volunteer at the local soup kitchen. My heart goes out to those poor homeless people I see on the street. So I try to take some time off from time to time to be like the good samaritan and help my neighbor in need.
Watchtower JW: It's good that you show concern for you neighbor. But the greatest help you can offer them is to share the good news of the kingdom with them. That leads to everlasting life under God's kingdom, which will solve all their problems, including giving them food and shelter. We need to show love for neighbor by helping them to put their trust in God's kingdom as the only solution to their problems - not vain human efforts.
Noble-Minded JW: Yes, but Jesus didn't just teach people. He also offered them practical help like feeding them and healing their illnesses.
Watchtower JW: That's different, Jesus was performing miracles to prove he was the Messiah and to demonstrate to the people what God's kingdom, with him as King, will do on a larger scale in the future.
Noble-Minded JW: Well, the good Samaritan didn't preach to the beaten up, left-for-dead Jew. He didn't tell him to trust in God to solve his problems and leave him lying there. He lovingly offered his time and resources to bring him relief and Jesus said we should be doing the same to our neighbor.
Watchtower JW: Do you remember that study article we looked at in the Watchtower a few weeks ago that talked about showing love for your neighbor? I invite you to go look at it again carefully. See who the faithful and discreet slave is telling us our neighbor is. It says our family and marriage mate and people we meet in our ministry. See the illustration on the first page of the article - the one with the brother helping the people dig out their stalled vehicle. Why is the brother dressed that way? Was it not because he was in the ministry. Think of the great witness he gave to the vehicle owners. Because he was out preaching they know that it was a Jehovah's Witness that helped them, and he no doubt used the opportunity to explain to them that the reason why he helped them is because he is one of Jehovah's Witnesses. So the faithful slave is helping us to see that in the modern day application the neighbors that we are to help is people we encounter in our ministry.