"Revelation 5:10 states: "You have made them to be a kingdom and priests to serve our God, and they will reign upon the earth." This verse suggests that those chosen by God will serve as both kings and priests, exercising authority and spiritual leadership on earth."
The word for 'upon' is EPI. That can mean on or upon or over.
What is the whole point of the kingdom of the heavens if they won't reign from the heavens?
Also, what is the point of John 14:2,3 "In
the house of my Father are many dwelling places. Otherwise, I would
have told you, for I am going my way to prepare a place for you. Also,
if I go my way and prepare a place for you, I will come again and will
receive you home to myself, so that where I am you also may be"
That shows that Jesus is resurrected to heaven and then he cleanses the heavens (prepares a place for them). What is the point if the rulership will be established on this earth?
Well, there will be earthly rulers too, the princes.
"2 Samuel 7:12-13—"I will raise up your offspring to succeed you... and I will establish his kingdom." This implies that governance is restored on earth, just as promised to David."
That is Nathan's promise from Jehovah that David's offspring will sit on Jehovah's throne forever. That was to lead to Christ. First it was Solomon and then his descendants. One sitting on Jehovah's throne is a sovereign ruler. That Sovereignty was lost at the time of Jehoiakim when Babylon attacked and that started the times of the Gentiles until 1914. Then Jesus became king. It is obvious that it was not on earth as it was in heaven.
That promise to David wasn't about earthly or heavenly. It was just that his descendant would sit on Jehovah's throne leading to Jesus.
It's so odd that the general population thinks that they will go to heaven and they don't know why and what they will do there. And they think that Jesus is coming back to the earth but they don't know why.
This has nothing to do with the Faithful and discreet slave. They would be ruling with Jesus in heaven.
The purpose of the 144,000 going to heaven to be kings and priests with Jesus is that they have a big job.
1000 years is 365,000 days. If 60 billion people will be resurrected, then that means that 164,383 people will be resurrected each day. It is a little more than 1 person per the 144,000 each day. So they will be busy each day just judging people during the resurrection. That can't be done on earth as humans.