You aren't taking the analogy far enough. That fish doesn't have a prefrontal cortex, and can't even comprehend what we are capable of or capable of perceiving.

You aren't taking the analogy far enough. That fish doesn't have a prefrontal cortex, and can't even comprehend what we are capable of or capable of perceiving. Whatever more advanced being that us would have perception and experience that we aren't capable of comprehending. They would do whatever they do that we are incapable of just as the fish is incapable of human-level creation.