Because our existence does not end with death.
Good question though, and it is important to recall this is true even in the case of souls going to Hell. Hence when Christ descended into Hell.
“Because our existence does not end with death.”
Then death is not the end of life but simply a change of condition or state? And resurrection is not the restoration to life but a reversal of that change?
“Hence when Christ descended into Hell.”
That would be “God as Christ the Son” according to your earlier comment? God was in Hell?