It was to fix the inadequacy of this mortal life, that Jesus offered resurrection

Jesus's job was to fix the inadequate nature, the insufficiency, of this mortal life on earth. 

This was achieved such that the purpose of resurrected eternal life in Heaven is for there to be a real and accessible state and place, where the intractable and incurable problems (that currently wreck any possibility of a good life) are permanently eliminated.  

If this mortal life was sufficient, or even if mortal life was perfectible; then there would be little benefit in offering the chance of Resurrection after death - because it would obviously be better to have all the good stuff and fix the problems of this world without first needing to die. 

"Christianity" is therefore for those who realize that the core problems of this world and mortal life - i.e. entropy/ death and evil - cannot be solved inside this life and world - because they are of the nature of this creation. 

Because the core problems are insoluble within this creation; our only possible and real hope is for a second creation; for our-selves to look forward to a "second" life, in a world without death and without evil.

And such a world, as a matter of reality, can only exist on the other side of mortal death. 

So; Resurrection is not about "jam tomorrow" or "pie in the sky" - it is not a wish-fulfilment daydream...

Because the truly wishful daydreams are radical politics and utopian schemes - like socialism and "transhumanism" - ideologies that pretend to offer a future that solves the core problems of life... 

Ideologies that pretend to make possible a situation where Mankind (here and now, or soon) will have fulfilment and satisfaction, and escape from fear and suffering - where mortal life will suffice. 

Those who believe such claims are real and possible, are never interested by Jesus's offer of Resurrection into Heaven that is located on the other side of death.  

Also wishful are those religions (including Christianity, in many times and places) that promise a "millennium"... 

That promise their adherents Heaven on Earth, perfected Man, a world purged of evil and death; a second coming, an earthly-saviour - such promises are also in this wishful category. 

Yet, if such things really were possible; there would have been no need for Jesus, and what he offered would be redundant. 

After all; a chance of post-mortal Resurrection to post-mortal Heaven would be a shabby second best to Heaven on Earth accessible without dying.  

The commonly-expressed idea of Resurrection and Heaven as a reward for a Good Life is grossly to under-sell what is on offer. 

This is to downgrade Resurrection and Heaven to a delayed "earthly paradise"... a world and life that is quantitatively better than, but not qualitatively different from, what we already now have.

If quantitative improvement of this mortal life ASAP is that which is most strongly desired; then Resurrection and Heaven are of merely subordinate interest.    

Even worse is to explain Resurrection in terms of the double-negative theology of Resurrection and Heaven as an escape from the default of eternal torment in Hell! 

This bizarrely posits a God who purposively creates a mortal life so-often dominated by evil and entropy, and always terminated by death; after which everlasting pain and misery is the default destination of all...

And then the same God devises Resurrection and Heaven which constitute a delayed and selective escape route from horrors of His own devising. 

If such a creator-God existed, He is not the same Good God as known and described by Jesus. 

So, even before we decide whether we personally desire Resurrection and Heaven; and even before we decide whether Resurrection and Heaven are believable...

We first need to know our present situation, what R&H mean in context of our present situation, what R&H are for: and what they do. 

Unfortunately, the clarity and simplicity of what Jesus did and made possible; is by-now grossly obfuscated by millennia of misunderstanding, misrepresentation, disinformation - and deliberate lies. 

The only viable answer would seem to be for each creatively and actively to work it out for himself - from intuitive-experiential knowing; as it were from "first principles'. With the assurance that God and Jesus Christ will with certainty have made this possible for all Men... Possible if not now, or during mortal life, then for-sure post-mortally.