So if Absolute power corrupts absolutely.
What about somebeing who has the absolute power over all of creation?
They essentially have a new, infinite set of legos.
Legos didn't corrupt me.
But I did make a hat out of them.
That being said, power is more corruptible, because the temptation is there to change everything into one's own image. Since no one is perfect, especially people who try to get absolute power, this often makes society worse.
That doesn't mean that power HAS to corrupt, though.