If we're really alone, does what we do / not do, have any real value? More anecdotal evidence for them could be said to exist than for God and if there are no E

If we're really alone, does what we do / not do, have any real value? More anecdotal evidence for them could be said to exist than for God and if there are no ETs/God/higher powers, and we're just alone does any of it really matter? Isn't all morality / law just whatever elites/leaders have determined is the best way to control us / let them maintain their power? If there is no karma (bad people prosper, while the meek/good often perish) why not just go full-Machiavellian? Is the only meaning in this world the pursuit of biological urges / or money-status? If we're alone, what's the point? By the same logic that priests having the power to channel / control the believers access to God have wielded tremendous power, the State would probably love if ETs were real, since it could then co-opt ETs into a mechanism for control. Or maybe the ETs can't be co-opted...