Origin of life and origin of species are, indeed, connected. Evolution generally requires the presence of life, and it's a fairly safe assumption that the presence of life will lead to evolution.
But we are speaking of theories. These are separate topics, each of which is addressed by separate theories. You claim that the theory of evolution contains fundamental assumptions of the origin and purpose of life. You must therefore be aware of a theory of evolution which I am not, and yes, I would be interested to know what it is. Chances are I would also argue against it.