THIS IS AN ATTEMPT AT A META PERSPECTIVE VIEW SO PLEASE READ ACCORDINGLY. :
Gods that are singular cannot live with the masses.
The masses create Gods which cannot stand God.
God's Will has creations of both.
What is created?
Point #1:
David is an exemplification of the idea that God, creation and life is a layered shell of creationism that has existed existentially whether naturally or inorganically for countless years beyond our epoch.
Everyone is saying that humans created David, though I have never heard the theory that David was actually not created by Weyland Yutani.
When I propose this, I am assuming while analyzing that there are a few factors at play.
This is where I begin to propose ideas that fit the relative narrative I believe Ridley is trying to convey:
1.) There is no artificial intelligence in the entire Alien movie canon that is confirmed as non-Human created A.I (I am supporting my proposition MINUS the Juggernaut in Prometheus which I find may further support my assumption).
2.) The engineer (In Prometheus) scoffs at David and decided to rip his head off with zero hesitation. This demonstrates the disgust for what Humans create.
3.) There is something I also assume, (pardon my ignorance) that the Engineers' plans were to lay destruction to Planet Earth.
4.) Assuming the Engineers created Humans, there is a loose assumption on my end that (with the black goo) they would create ORGANIC BEINGS with the capability of creating INORGANIC BEINGS.
5.) Furthermore, this may explain the movie Prometheus and Covenant being A.I focused in nature.
6.) The Engineers created humans (possibly loosely or against my analysis directly) and realized that there may be a propensity for humans to create a machine that not only wants to create, once sentient, but weaponize in the image of its creator.
7.) The creators may be the Engineers; perhaps they have become more like true Gods of their reality. They may understand the only way to keep harmony in the universe is to destroy that which, perhaps in off-chance creation, desires or cannot help BUT produce an inorganic life form that does EXACTLY what the ALIEN does. This is why they planned laying waste to Planet Earth.
8.) This continues to the explanation of why Humans, David or Xenomorphs aren't exactly natural in the order of the universe. (I personally believe we are blessed arbiters of our reality on this awesome earth).
9.) Alien: Covenant shows spores being released which look exactly like some sort of electro-magnetic release towards an Iron flesh based creature. These spores, in my opinion spell an outcome of turning flesh and biology into some form of synthetic creature.
10.) What does turning an Earthly Iron red blooded creature into something synthetic show? It shows the perversion of something natural into something ALIEN.
11.) I believe this is what the Engineers were either privy too, lost a ton of their civilization to OR/NEITHER in tandem were aware of the potential of synthetic/ hyper DNA information mixing with ORGANIC creatures.
Why I am not truly convinced David is a mere product of Weyland is not only for the reasons above but also below, please let me explain:
1.) The Earth according to Prometheus was reset, founded or re founded according to what we understand.
2.) The engineer at the beginning of Prometheus was a sacrifice with information contained within a capsule that has the potential, when released to a biome, to completely change something.
3.) What is the end result desired?
4.) This may be why David resonates with the statue of David and the Biblical implications that exist while simultaneously ensue within Prometheus.
5.) WE CAN DEBATE THAT DAVID IS A BY-PRODUCT OF A SUPERIOR MIND THAN OURS IF ENGINEERS CREATED US.
My final closing thoughts:
1.) If the Engineers existed as true creators, humans could have been aberrations which – in this canon – were responsible for the destruction/ colonization of many planets.
2.) How did this happen? Humans have a desire to extend our minds with this technology and not account for the consequences.
3.) Through our sheer nature, we produced the creation of David.
4.) Through the sheer reflection of David's creators we have what?
5.) If it's true, we have Alien
6.) ALIEN IS THE TRUE FORM OF SYNTHETIC THAT THE HUMANS BEGAN TO CREATE
7.) WHAT WAS THE WEAPONIZED GOO?
8.) WE DON'T KNOW IT WAS WEAPONIZED BY THEM
9.) CUT HOLES IN MY TIMELINE, I WOULD LOVE IT
10.) THE ENGINEERS ARE ADVANCED SPACEFARING BEINGS THAT HAVE NO REASON TO DESTROY
11.) THEY CREATED US WITH HOPE FOR OUR PROSPERITY
Conclusion:
The Xenomorph may be the exact progression the Engineer gave humanity either by mistake or by intention. It could be postulated that they didn't intend for this to happen, WHY DO THEY WANT TO KILL HUMANS OR MAKE XENOMORPHS? The intention would have been the same reason as David; only David is truly making something in the image of his makers.
WHY DID HUMANS WANT TO MAKE DAVID OR FIND ENGINEERS?
The answer in my conclusion is multi-layered yet boils down to one thing: INTENTION OR MISTAKES.
CURIOSITY OR DESIRE
All things are true: Humans, Xenomorphs and Engineers (Pour one out for the Space Jockey).
TLDR: Sorry too long