No. He spoke plainly enough in the Sermon on the Mount when He began His ministry. But those who hated God would not receive it, but came at Him to dispute about the legal requirements of the Law vs. Jesus doctrine. So Jesus began to use parables. He said that he did so so that the nay-sayers would not understand.
That kind of Jew had been unwilling to hear God's words spoken to them plainly for centuries, but had chosen to stop their ears and close their eyes. to God's words and signs. Speaking in parables to them gave them nothing to argue theologically against. Are they going to argue about how shepherding works and how seeds are planted and grow? Since it was God's will that Jesus cast out no one who came to Him, and these antagonists were coming to disrupt Jesus' ministry with theological arguments, drawn by the Father, the strategy was to make the adversarial walk away of their own free will, leaving the genuine seekers to ponder on the meaning of the parables and to observe the perfection of the Lamb.
That kind of Jew had been unwilling to hear God's words spoken to them plainly for centuries, but had chosen to stop their ears and close their eyes. to God's words and signs. Speaking in parables to them gave them nothing to argue theologically against. Are they going to argue about how shepherding works and how seeds are planted and grow? Since it was God's will that Jesus cast out no one who came to Him, and these antagonists were coming to disrupt Jesus' ministry with theological arguments, drawn by the Father, the strategy was to make the adversarial walk away of their own free will, leaving the genuine seekers to ponder on the meaning of the parables and to observe the perfection of the Lamb.
As He explains the parable, He goes on to state that those who hear and understand are the ones who bear fruit. These are the ones who it has been given to know.
Jesus did fine making the adversaries walk away of their own all the time without the use of parables. A whole group dropped stones and walked away. He silenced the lawyer who questioned Him. He silenced the Pharisees all the time. He didn't need parables to do so. He simply used wisdom, and spoke as one having authority.