That's why I liked the movie "Contact" with Jodie Foster. When they got the alien transmission it was primes, then it was a Nazi broadcast they bounced back with instructions to build the giant gyroscope. I found it to be a cerebral movie and I loved those twists.I always preferred the Stanislam Lem sci-fi interpretations, like in His Master's Voice.
In that book, an alien transmission is so unfamiliar to humans that they spend decades trying to decode it without getting past the very surface.
Like that Graham Greene quote:
“You cannot conceive, nor can I, of the appalling strangeness of the mercy of God.”
If we could understand God, it would be too boring. And boring fiction is not worth reading or getting into.