The premise doesn't make sense (and wouldn't work)

So the premise is that these 'advanced enough to build a spaceship' people do not know what entertainment is.

They have never read a poem, indulged in a fictional story, or heard or told a joke.

That's like saying that these masterful championship runners don't know what walking is.

You develop stories, storytelling abilities, entertainment in VARIOUS forms _LONG_ before you develop any kind of ability to build even primitive computers, let alone friggin' enormous SPACESHIPS and PORTALIZING systems (I don't know what to call these almost-portals in the movie, but it's highly-sophisticated technology in any case) and spacefaring ability!

The MOST PRIMITIVE tribes on the planet already know how to tell fables, stories and jokes to each other. It's just SO stupid that someone advanced would not have developed the very fundamental and crucial thing for teaching people values and morals, like STORIES, and therefore, all kinds of entertainment, that the MOST PRIMITIVE PEOPLE ARE ALREADY ABLE TO DO, UNIVERSALLY.

Look, either you are as primitive as animals, or you know what entertainment is, you can't be advanced and not know entertainment and fiction.

I mean, look at children - when they come to this world, they already have IMAGINATION. Of course the school system strips it off of them, but that's another STORY (no pun intended).

When you have imagination, you have possibilities in your mind, and this is how stories are born - when those possibilities are not met by reality, but you still want to tell about them to others, that's how entertainers and entertainment is born. Children have vivid memories of the astral world, although it may be mostly 'feeling-based' after a certain age, it still remains as a memory that provokes the imagination.

Children are imaginative, no matter WHAT world, race or bodily shape they are incarnated into. I mean, to call them 'children' is a bit wrong anyway, because even what we call 'children' are really just 'adult souls living in very young bodies until the bodies grow old enough to let them access their full adult 'minds' (for the lack of better term)'.

A child is not stupid because they were just farted into existence; a child is stupid because it doesn't YET have full access to all its faculties it is carrying with it at all times. A baby possesses memories of multiple lifetimes and cosmic secrets and lots of imagination, personality and all that - but it's not yet able to express or access those things. Only when the physical body (and the higher bodies with it) cultivate to a higher level, can this informational-psychological-spiritual energy flow reach its normal heights, and they can fully function again.

Of course a physical body ALWAYS acts as a heavy weight, a block to MOST of what people are, so they can't even as adult FULLY express their TRUE selves until the physical side is gone (again), and then most people make it worse by consuming harmful substances and anchoring themselves even deeper into the physical until anything higher is just a vague memory, if that.

But to tell me that they don't know what ENTERTAINMENT is, is just REALLY, really stupid and doesn't work! If you know how to build a campfire, you know how to tell stories. If you know how to tell stories, you know the difference between fiction and reality. If you have imagination, you BUMP into the difference between reality and imagination constantly.

There is NO WAY any civilized (or even PRIMITIVE) species or tribe would LACK this fundamental soul characteristic, there's NO WAY this premise could ever work or make any sense!

You can't be a super advanced runner without ever knowing what walking is!