The only moral of this story I understood is that it is nonsensical to compare two different metrics. I do not know how one would come to the above conclusion, comparing Alexander’s power over many others to Diogenes’ power over himself and presumably pain receptors.
Alexander being able to kill Diogenes more easily than Diogenes being able to kill Alexander would be a proper comparison, or Alexander being able to compel more people than Diogenes, but even then, I fail to see the utility for this discussion.