The sealing of the 144000 is a future occurrence. This according to the context of Rev. 7. So I believe Witness interpretation is all wrong. And if that is the case, the governing body is illegitimate. The changeover from Rev. 6:17 to 7:1 makes it clear.
While the high and mighty of the earth and their attendants run to their underground cities to hide, leaving the ordinary folk to fend for themselves, the remainder of the 144000 are being sealed. These are taken from the twelve figurative tribes of Israel, i.e., “the Israel of God” (Gal. 6:15, 16; Rev. 7:4-8). God’s angel will be sealing them during the prelude to the Tribulation, 12000 from each tribe (Rev. 6:12-7:4). These follow in the footsteps of their Master, Christ (Hebr. 12:2). They would be sealed for their protection (Rev. 7:3, 4; 9:4).The transition between aforementioned chapters of Revelation is introduced by the Greek phrase Καὶ μετὰ τοῦτο (Rev. 7:1 Tischendorf’s New Testament, 8th edition), “and after this,” “this” referring to the kings of the earth and their followers, finding refuge in their underground shelters.
What makes it worse
is that they withhold the memorial and the partaking of the emblems from 7-8
million people and all those before them. Jesus made it clear: “Accordingly Jesus said to them, Most truly I say to
YOU, Unless YOU eat the flesh of the Son of man and drink his blood, YOU have
no life in yourselves (John 6:53 NWT).”