Folks just aren't understanding the power of God.
Isa 25:5-9
5 Thou shalt bring down the noise of strangers, as the heat in a dry place; even the heat with the shadow of a cloud: the branch of the terrible ones shall be brought low.
6 And in this mountain shall the LORD of hosts make unto all people a feast of fat things, a feast of wines on the lees, of fat things full of marrow, of wines on the lees well refined.
7 And He will destroy in this mountain the face of the covering cast over all people, and the vail that is spread over all nations.
8 He will swallow up death in victory; and the Lord GOD will wipe away tears from off all faces; and the rebuke of His people shall he take away from off all the earth: for the LORD hath spoken it.
9 And it shall be said in that day, 'Lo, This is our God; we have waited for Him, and He will save us: This is the LORD; we have waited for Him, we will be glad and rejoice in His salvation.'
KJV
That is where Apostle Paul was pulling from when teaching about 'death swallowed up in victory'. Who all is that being applied to here in Isaiah 25? It applies to ALL... nations, ALL people on that event of the "last trump".
It has long... been assumed by men's traditions that Apostle Paul was talking about the Church only... in that change at the "twinkling of an eye" on the "last trump". Not so, as here in Isaiah 25 is where he was pulling from about death being swallowed up.
As our Lord Jesus said in John 5:28-29, all the dead in the graves will hear His voice in that specific hour (at the "last trump") and come forth, both the just and the unjust. Then Rev.5 teaches that Christ's elect will then reign "on the earth", which has to mean in the resurrection type body, i.e., the "spiritual body" which Paul taught in 1 Cor.15.
At that point in time on that 'day', death in the flesh will be no more. The only type of death possible after that point will be the "second death" of Rev.20.