So you have no idea how life got here and yet claim to know everything that happened thereafter?
I have a Scientific Theory, supported by evidence and proper application of scientific principles that provides a general picture of how species now in existance became as they are.
I leave "knowing everything" to those (humans anyway) who know nothing.
You are missing the point. Scientific theories are not all encompassing. They explain a certain set of phenomena and let other theories handle the rest. For example, the theory of plate tectonics doesn't include star formation. The theory of evolution do not include the origin of life because 1) we don't know, and 2) it doesn't matter.
God could have made the first organisms, then evolution happened. TToE still stands.
Natural processes could have made the first organisms, then evolution happened. TToE still stands.
Super advanced aliens from another dimension could have made the first organisms, then evolution happened. TToE still stands.
So you see, the origin of life is a moot point. Now matter how it happened, evolution still took place afterward.