False analogy. If nothing is complex, then you would have an answer to how planets were exactly formed and be able to replicate them, let alone a universe, or can you? It's why you need an intelligent agent as a cause of how it created such complexity as the solar system, because then it would make your argument valid. Because only such intelligent agent would be able to 'easily' create or manipulate such complex system.<quoted text>
No, if we found a computer on Mars that would be evidence that someone built it and put it there. Your design analogy fails as computers are not naturally occurring self-replicating organisms.
"Design" is assumed. How exactly is "complexity" measured in your examples? I can quite easily provide you with examples of EXTREME complexity, made PURELY by natural forces. Of course you could demonstrate me wrong by providing evidence of the mechanisms used by your intelligent agent responsible for them.
Complexity alone does not necessarily indicate intelligence. And in fact may be the opposite of what you require. A designer wants things to be simple, easy to create, easy to repair. Complexity is a barrier to that.
Here's another reason why you're wrong. Someone has written "Hello there!" in the sand. The symbols involved are actually very simple. They were designed that way so they would be easy for people to remember when learning the language. Yet it's not likely that a combination of wind, rain and water would be able to make those shapes in the sand. But it's very easy for someone to just grab a stick and write it.
Nearby we can see some pretty repeating criss-cross shapes made in the sand. One might even describe them as more complex shapes than "Hello there!" Made by crabs, an unintended side-effect of the way they walk. But again easy for someone to imitate by just using a stick. However while we know that natural forces are incapable of creating one, we know that they are capable of creating the other.
It's not the alleged "complexity" of something that's important, but the mechanisms used to create those phenomena, and what they are capable of.
It may look like a crab or crabby in nature but then we already have the cancer constellation. lol