Another thing about a prabable is that it open the eyes of people who otherwise would not hear it.
e.g Jesus ask the pharisses a question, about who should love most, the parable opens the eyes of the pharisses and they say, "The one who had most forgiven"
Outiside of their programmed beliefs that anything gentile = less, dog, second class
Now the parable iserts a loophole, so that Jesus does not say gentile, and opens their heart to see that the one who is forgiven most loves most.