I am open to the theory that some sort of life exists elsewhere in the universe. I am less open to the idea that "they" are our ancestors. Believing in life in another galaxy far far away is great fun, but believing that it kindled life on earth is like believing in talking apparitions of virgins, IMHO. Our intelligence makes us like unto gods because we make the gods we are like unto. The brain has no problem mixing fact with fantasy, or learning with yearning. The brain is not to be trusted with anything other than empirical evidence, and even that you can't get twelve brains to agree upon. 😉
If there is a God, he must have created us as an example to the rest of the animals of what happens to animals when their brains get too big.
God: "Okay, you can eat dirt...or vote for politicians."
Worms: "Hmmm....."