Obviously life got started. The proposition that it is possible for protoplasmic life to get started surely involves beating the odds. Once started, life’s purpose is to proliferate. This is so obvious it’s completely missed – other guesses as to purpose proliferate instead.
Protoplasmic life intends to spread out – its desire is to inhabit every space it can, even by making uninhabitable spaces habitable when it can. The human role in this should be easy to see, since humans are the only species capable of space travel. Life’s risky shot at refraining from dealing with the humans as a plague species is likely due to their destiny – to carry life out into the universe.