Well, yeah, our views are different. Life on earth can certainly be different from what may be found elsewhere. After all, we have this great variety even on earth, an new species have not stopped evolving. We may never know what is there is other places because life may have not yet evolved / may already have died out there; we / they may not have the technology to communicate; and we are at a huge, huge, huge distance from them and there is no indication that we may be able to do so in future. We are, so to say, stranded on this blue planet.
The blue sky is not important. What is important that there does not seem to be a possibility of a storm, heavy rain, and there is sun where it is cold. We love the blue sky for these existential reasons. As for your God, Jesus, angels and demons, I do not believe in any of these.Yes, if you can imagine a ghost breathing into a virgin and impregnating her, then we can also imagine absolutely human avataras. It takes nothing to imagine.