Why Zeus 'Feared In Prometheus'

Zeus had no real reason why he had fear Prometheus’s creation man, In the story Prometheus gives fire to man it said, “Zeus feared what men would do if they had fire. He had a low regard for them and really wanted to destroy them” ( paragraph 3 lines 1-2). In the story it never explained why zeus had a real reason on why he feared men, fear of what they might do, or even would want to resort to violence when men have done nothing to him without Zeus even giving them a shot at using his fire for good. Prometheus even points out a good point that without Zeus’s fire, man would have not survived, “Prometheus pleaded for the race of men, pointing out that earth was getting colder, entering an ice age, and no longer radiating warmth as in the age