Not only was it to provide for the resurrection and immortality of all humankind, but it was also to enable us to be forgiven of our sins—upon conditions established by Him.
In pockets, there appear what my colleague, Fred Spier, calls "Goldilocks conditions" -- not too hot, not too cold, just right for the creation of complexity.
Everlasting life in peaceful, pleasant conditions, without the threat of illness, war, famine, or death, would surely open the door to endless happiness and blessings.