All lives are not of equal worth. If that were the case the president wouldn't have a phalanx of Secret Service protecting him at all times.
If there is a God (or equivalent deity), he would be worth infinitely more than any other sapient being, thus disproving that all sapient beings are of equal worth even in a spiritual sense.
Generally, God does care about other things, though - so still not equal :-)
> Let's not conflate human worth with value to society.
You're mistaking value to society with human worth, the exact distinction the OP wanted to make clear.