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.
Much as the origin of water and meteorology are connected.
The important point in BOTH cases is that the latter theory is INDEPENDENT of the theory regarding the former, respectively.
The Theory of Evolution is not dependent upon how the first life arose anymore than weather forecasting is dependent upon how water came into existence.
Naturalist sophistry apparently permeates not only the theory of evolution but also those who defend it. Afraid to call a spade a spade while drowning in the opposite opiate of self-delusion.
No need to waste it on this simple fool.
It only leads to evolution if God is dismissed out of hand as a possible source of Creation. That is why evolution and abiogenesis are irretrivably connected. They are both totally materialistic/atheistic theories which feed off each other by attempting to deny the existence of God by trying to explain life by wholly materialistic means.