lots to address in this, but I will for now focus on this:

Our planet is at the perfect axis and exact distance from the sun. One centemeter in either direction and life does not exist.

Life as this planet has evolved under these conditions. It does not mean that life could not have evolved here under slightly different ones. And if they had been slightly different, the entire history of (Earth-bound) life would have been different, but it doesn't mean it would not have happened. And it does not presuppose someone or something "arranged" it.

Other planets have been discovered on which life can exist, based on the simplistic parameters used to categorize a celestial body of substantial size and gravity orbiting a star as a "goldilocks" planet. We may never get to interact with that life. But if we find traces of previous life on either Mars or Venus, it will become that much harder to make the argument that Earth is special among untold billions of trillions of such orbiting entities. Statistics and mathematical probability have already made that argument convincingly. 

One thing I am certain of is that if and when life on another planet has been found to exist (past or present), there will still be humans of a religious frame of mind who will decide that even THAT life was placed there for US to find, as if it's some sort of puzzle game we are being tested on.