Why did Jesus say he was not good (agathon | ἀγαθόν) ?

Now why did Jesus though sinless say he is not good (agathon | ἀγαθόν) ?

The mission of Jesus was to save sinners. The religious elite (Pharisees and Scribes) created elaborate oral traditions to protect themselves from becoming "ritually unclean." They taught that eating or socializing with those who did not strictly follow the law—like tax collectors and "sinners"—made a person spiritually defiled.

Luke 5:31: "It is not the healthy who need a doctor, but the sick".  32 I have not come to call the righteous, but sinners to repentance.”

Just as a doctor must touch the disease to heal the patient, a spiritual savior must engage with sinners to bring them to repentance.

Proverbs 18:5 It is not good to accept the person of the wicked

Mark 10:17 And when he was gone forth into the way, there came one running, and kneeled to him, and asked him, Good Master, what shall I do that I may inherit eternal life? 18 And Jesus said unto him, Why callest thou me good? there is none good but one, that is, God.

Psalms 1:1 Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful.

Luke 15:2 And the Pharisees and scribes murmured, saying, This man receiveth sinners, and eateth with them.

Jesus came for the sinners, the lost sheep, to save them, he was in their midst, accepted them and finally gave up his life as ransome to redeem them from their sins.

1 Peter 2:24 He personally carried our sins in his body on the cross so that we can be dead to sin and live for what is right. By his wounds you are healed.

Old testament Prophecy about Jesus

Isiah 53:5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed. 6 All we like sheep have gone astray; we have turned every one to his own way; and the Lord hath laid on him the iniquity of us all. 7 He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth. 8 He was taken from prison and from judgment: and who shall declare his generation? for he was cut off out of the land of the living: for the transgression of my people was he stricken.

John 10:14 “I am the good shepherd; I know my sheep and my sheep know me— 15 just as the Father knows me and I know the Father—and I lay down my life for the sheep.

Luke 23:46 Then Jesus, calling out with a loud voice, said, 'Father, into your hands I commit my spirit! ' And having said this he breathed his last

John 10:17 Therefore doth My Father love Me, because I lay down My life, that I might take it again.  18 No man taketh it from Me, but I lay it down of Myself. I have power to lay it down, and I have power to take it again. This commandment have I received from My Father.”

John 8:54 Jesus answered, “If I glorify myself, my glory is nothing. It is my Father who glorifies me, of whom you say, ‘He is our God.’ 55 But you have not known him. I know him. If I were to say that I do not know him, I would be a liar like you, but I do know him and I keep his word. 56 Your father Abraham rejoiced that he would see my day. He saw it and was glad.” 57 So the Jews said to him, “You are not yet fifty years old, and have you seen Abraham?” 58 Jesus said to them, “Truly, truly, I say to you, before Abraham was, I am.”