What is your opinion on Alien Astronauts / God-as-alien-bio-scientist theories?

I think you are referring to the series called Ancient Aliens. Much of that has been disproved. Although I will say this. I would probably accept that as a more credible theory than most religions or philosophies because there is a high probability of there being life on other planets. However, according to that show they believe that the ancient Sumerians were the first Sapiens Sapiens and that the aliens used them as slaves. They said that aliens saw mankind and they changed our dna to form modern humans so that they would have a workforce to mine the planet for its resources. This is all based off of some peoples' interpretation of some Sumerian tablets. There are some things that are in that series that science has yet to answer though, and I find that interesting. If that theory were to somehow proven I would actually be pleased. Then we could finally do away with all the religious nonsense in the world. However, it would cause us to have to rewrite our history from a different perspective.