if we assume that there is no inherent purpose to existence, and the only thing we have on top of basic instincts is our sentience, because without it all that is left is an automaton -
that would mean that the only fundamentally meaningful thing is making use of it
if we assume that greed is innate, and our current society is driven by it -
that would mean it has failed, because that makes it not only purposeless, but also explicitly harmful by creating unnecessary struggles and suffering