Or maybe this is just a CI test run isolated environment.
> Test run #896643 for commit hash...
> Comment: Altering initial seed value for Sol, trying to fix issue where intelligent life fails to maintain stable planetary environment.
Here's a far more plausible one: Large-scale space exploration and space engineering are ultimately not worth it, and any sufficiently advanced civilization eventually realizes this. The meme that "civilizations need ever more resources" is a reflection of humanity's past two centuries, not some universal truth.