Luke Skywalker is shown as natural born talent. Which is why he can become Jedi despite being too old for it and emotional. His hero journey starts with right genetical inheritance.

> Look at Greek mythology. No one could understand why Zeus got all pissed off, but he was Zeus. He was kind of inscrutable.

I think he is just powerful rather then impossible to understand. Not that I am expert, but Greek gods don't come across to me as something alien. They are fairly human, emotional at times rational at others, political among themselves, but definitely too strong for actual humans to handle.