"Why Would Jesus Create Parables with “Secret Meanings”?"
I have your answer. The pointer to your answer is in the title of "Unlocking the parable of the UNJUST STEWARD." The key words "unjust steward."
We live in a world with an unjust steward. And, in this world everything is censored. Just picture yourself, for a minute, living in Russia. Would you be able to openly talk about the war in Ukraine. No, you would not. Putin is an example of an unjust steward. The first thing those unjust stewards do, every time, is limit freedom of speech and thought.
So, in order to communicate in such a world. a person (ie: Jesus) would have to use a kind of code. It is only very few of us (ie: me) that can actually learn this stuff.
Now, I am telling you. Do something with this fucking knowledge you half-wit!!!