You are basically saying that the purpose of all life forms is to create further life forms, whose purpose then is again the same. In other words, the purpose is eating its own tail. In my mind, this circularity disqualifies it from being a meaningful purpose.
That's not a "purpose", though. It's a precondition and a post-fact explanation for why life exists. There's nobody to say that any individual is supposed to continue the cycle.
