So being a scientist means you cannot have hands neither?
not against a trained killer. Be serious man. The already established people where genetically engineered for a purpose, so if Jor El was the foremost scientist and Zod the foremost warrior, he shouldn't stand a chance against him. Could fukking Plato fukk with Achilles in a fight?
the whole Kyrpton scene could've been the reboot of Masters of the Universe with Jor El being He-Man's father and Zod being skeletor before getting fukked up.
The whole point for them coming to Earth was for the codex, so there's no reason why Superman couldn't lure them to a more remote location to do battle, simply because they were after him and needed him to accomplish their goals.