You're inventing a narrative taken out of context!
Revelation 5 is clearly a vision of things seen in heaven, not on this earth. The saints of heaven, who shall reign forever with the Lord on the new earth. According to Scripture when we become saved we are reigning spiritually with the Lord in heaven through His Spirit within. Because in life we had spiritually entered the Kingdom of God, when faithful saints die they go a spiritual body, John sees as living "souls" to heaven. But heaven is not our permanent home. These souls in heaven shown John in this vision will return with Christ when He comes again (1Th 4:14). Then we shall be changed from mortal & corruptible body to immortal & incorruptible body, fit to reign with Christ throughout eternity on the NEW EARTH.
In this vision John was shown the full embodiment of heaven that shall be when the spiritual Kingdom of God in heaven is complete!
Revelation 5:1-14 (KJV) And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals. And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and to loose the seals thereof? And no man in heaven, nor in earth, neither under the earth, was able to open the book, neither to look thereon. And I wept much, because no man was found worthy to open and to read the book, neither to look thereon. And one of the elders saith unto me, Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof. And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth. And he came and took the book out of the right hand of him that sat upon the throne. And when he had taken the book, the four beasts and four and twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints. And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation; And hast made us unto our God kings and priests: and we shall reign on the earth. And I beheld, and I heard the voice of many angels round about the throne and the beasts and the elders: and the number of them was ten thousand times ten thousand, and thousands of thousands; Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing. And every creature which is in heaven, and on the earth, and under the earth, and such as are in the sea, and all that are in them, heard I saying, Blessing, and honour, and glory, and power, be unto him that sitteth upon the throne, and unto the Lamb for ever and ever. And the four beasts said, Amen. And the four and twenty elders fell down and worshipped him that liveth for ever and ever.
1 Corinthians 4:8 (KJV) Now ye are full, now ye are rich, ye have reigned as kings without us: and I would to God ye did reign, that we also might reign with you.
1 Peter 2:9 (KJV) But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light:
Revelation 1:5-6 (KJV) And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood, And hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen.
Revelation 5:9-10 (KJV) And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation; And hast made us unto our God kings and priests: and we shall reign on the earth.
Revelation 20:6 (KJV) Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
Because we live and reign with Christ in time, symbolized a thousand years, we shall also reign with Him in a spiritual body in heaven after our body dies. Then when we are clothed in immortal & incorruptible body of flesh again, we shall continue to reign with Christ physically throughout eternity on the NEW EARTH!