But that sky is all an illusion gawd. It's all a construct in your mind.
Possibly.
The text implies there are other species who have done likewise.
No it doesn't.
What you could say it is implying is that IF there are other intelligent species than they have done otherwise or that they will eventually.
@Gawd it’s a hypothesis. The text states an affirmative case I.e. “Religion is...” which is clearly not proven as there is no precedent to compare it with.