Not true. You can have astronomy without the Origins of the Universe.
TToE does not deal with the origins of life. It deals with what happened after life began that led to humans.
Again, you have to look at the evidence. The picture the fossil record paints, combined with observed microevolution paint a clear picture and the forces that create that picture.
What preceded the picture isn't of direct importance.
So you have no idea how life got here and yet claim to know everything that happened thereafter?