I wouldn't say that everything Jesus taught was meant to be mere "parable" (I think you mean metaphor). While the examples you post above are obvious metaphors, much of what Jesus is quoted as saying cannot meaningfully be interpreted as metaphor. Was his "Heavenly Father" only a metaphor, for instance? Was his command to love one's enemies only symbolism of some sort?
In any case, it appears to me that many people take interpreting scripture metaphorically way too far especially if passages taken literally will result in the Bible saying something that is false. Many Biblical apologists take that tact "saving" the Bible by explaining away Bible errors as metaphors!
So if you disagree, then please explain all my mistaken statements (if there are any) as mere figurative language on my part!
The Bible scripture has the word parable in it 32 times in the new testament and 17 times in the old testament. Symbolism is used profusely throughout the old and new testament even when unexplained like, "now this is going to be a parable or this is going to be a metaphor" so pay attention so you can understand it. Scriptures include metaphors, allegory and personification. A nation is called a tree also called a mountain so those are metaphors, but Lucifer is perceived as a name for an entity of human characteristics when it actually is a personification of an object controlled by humans in war.
A "talking donkey" is the personification of an abused human that warns the abuser of danger. The Jesus lessons were parables. But he also used a large amount of symbolism including metaphors when teaching; symbolic meaning attributed to natural objects or facts. The topic being what Jesus taught was largely symbolic not literal but many events that happen are literal especially for future events but explained in symbolic ways as Jesus is a prophet telling us future events. The Apostles had to be taught exactly what was the meaning of his parables including his use of metaphors because they were difficult to understand. Few would understand that Bread means both flesh and doctrine or a rod of iron represents a rifle, army. The "right" hand is the hand that controls the military. The inner court is where the Commander in Chief resides and the outer court is the military.
People are to know a woman was not made from a rib, a serpent can not talk and by the way, Eve ate that fruit first but was not a goddess afterward. The Abrahamic religion that grew out of that fairytale of "forbidden fruit' that can make a human a God, made a throne for a man allowed to call himself the Lord, but no throne for a woman. BOTH male and female ate the fruit.
Adam had the greater "sin" because he had the opportunity to bend the knee to his Lord God and ask for forgiveness of Eve because she was naive not understanding that lies had entered her existence. Adam refused to lower his ego or submit to the judgement of God by his eating the fruit. If he loved Eve he would have prayed to God to help her with mercy and forgiveness but Adam only cared about himself, not Eve. Adam claims to know exactly what he is doing so Adam wants to become a God by eating the fruit to become a Lord never again having to obey a deity. That Lord becomes the voice of his invented deity so he is their God.
Eve ate because she was ignorant, and she even wanted to share the power she thought she would receive, with Adam so he also could become a God not under the control of anything so attaining his freedom. But Adam now cast out into the world, wanting to be the Lord, desired Eve to be subservient and not equal to Adam in any way.
Adam and Eve are not the first humans on Earth, they represent the first Hebrew/Jews, a race of people. This race of people would kill people for not believing in their talking snake fiction that exalted Hebrew/Jews as superior to other people with the self given right to kill people for not serving them. Their religion is one of horror and their invented Lord God desires to see children burned alive and infants dashed against rocks and the Hebrew/Jews made certain that happened to exalt themselves.
Jesus was sent to stop their reign of terror so they demanded he die even though Jesus was innocent. Jews manipulated justice with threats and hatred to make the death of Jesus happen.