The fundamental starting point that the universe is objectively indifferent. Nothing matters to it, which ultimately means that we humans are the only ones ascribing subjective values. Good, bad, happy, sad. Any purpose in life is human made, we are what makes things matter - giving our corner of the universe the ability to think, feel, want etc.
And while it cant be extrapolated to other complex processes, part of our natural existence is seeking out those pattens even in the universe - for some it even helps using human experience analogous to complex mechanisms.
QED we should be able to treat the universe like just a lil Buddy of you want to
While the universe is indifferent because it is not conscious, it is entirely within the realm of possibility that there is a pattern to the goals that rational minds that can exist in this universe find attractive.This pattern would be an objective structure to morality and arguably would qualify as an inherent purpose to the universe