As an example, the atom was hypothesized prior to it's observation... but let us not split hairs! The OT deserves respect and there are other hypothesis around the OT question that are just as easily inserted into the blank on this.
I've always been interested in the possibility that the purpose of life is to reproduce, spread and infuse into any unoccupied habitat. Looking at it from that perspective then it looks like the purpose of human life is to spread Earth life to other planets is plausible. Maybe a technological civilization is the Earth's version of gonads and we are the mechanism by which Earth Life spreads to new planets and the universe!
Seriously dude, my hypothesis has just as much support as the purpose you propose...
The purpose of life is to reproduce, to create new life and DNA! Even that is nothing but anthropomorphism taken to its extreme. I am having a real problem with the idea of purpose in this context.
Where is that purpose coming from? Did AI seed the Earth so that eventually a new AI would emerge? If AI is the purpose of life then you, at the very least, are proposing that a metaphysical process is in charge of the Universe. Isn't that the same thing as supernatural?