why do we live like that?

1. We must maintain the tradition of the journey to lead our ancestor to the Afterspace. 
2. It's not the planets that are cursed - it's us. We carry the weight of millennia of sins. We are too corrupt and impure to taint the worlds with our presence.
3. The Vectors were given to us for a purpose. We must follow them no matter what. And when the time is right - we will know the reason.
4. The Destroyer preys upon mankind. We must remain on the run.
5. It is not important why the Pilgrimage has started. But now the journey is a crucial part of Paths of Universal Interconnections. We've carved our ways, the Paths that aren't ours anymore. Now it's our duty to continue the work.
6. The Null-Drives of the Worldship are in fact powering the simulation of the universe. If they cease to operate - we cease to exist.
7. Vectors make an enormous sigil, unfathomable for mortals. Artificial Gods are constantly reshaping and perfecting it. We just test its integrity.
8. If you stay on a planet for too long, you wake up. And the reality is much, much worse than the Dream World you experience now.
9. There are no planets, and the moons you've seen are just asteroids. It's just a mystification. Hallucinations caused by... someone, maybe Synth-Gods, to conceal something. Something sinister.

dreamer report #2

it felt like an awakening

but it was just a black inner surface of hellish sphere suspended in nothingness

i felt the presence of an anti-glow of something in its center

was too afraid, too overwhelmed by terror to look up 

 

the thing has either materialized before me

or was there all along

maybe omnipresent in its prison

i felt its gaze, heavier than the weight of universe

 

and i knew it felt nothing

it was just examining an insect

no

just a speck of dust

 

the force of cosmos

we know as a destroyer

is just what managed to seep through the cracks of reality

just a projection of its will

 

a dream within a dream

an imagination of unimaginable

a dream of an entity

incapable of dreaming 

We do not know who this particular Dreamer is or was. Maybe there's only one Dreamer, a reincarnating entity that lived for most of current era. Or maybe it's Sol or other Wanderer. 

dreamer report #1

I have traveled far away, with my dreams being perpendicular to the sanctified Vectors
I have reached the outer boundaries of the Void - and the gates were opened before me
And I traveled to the Beyond, through the Unknown Beyond 

And I have seen the anti-suns of the Unknown Beyond
The beacons illuminating the Slumber
And their thoughts were swirling around me 

And then I realized it wasn't my Slumber
And the gates were opened before me
To let me to be noticed

And now it knows about us
But perhaps it already knew
As the Vectors are piercing through the sacret un-flesh of the Secret Cosmos

The Outer Thought is a taint of the pristine matter
Stain on the fabric of all realities
Thus he comes to undo

?