GOD loves us and yet we die. If we do not die, then there is no reason for our offspring. and the earth would quickly become overcrowded and unlivable.
Without the extinction of the dinosaurs, humans and other mammals would not exist. Diversity requires different environments. GOD’s universe is not infinite, so change and death are an innate part of it.
GOD’s Love is the reason behind eternal life with GOD in the hereafter.