Note to whom Jesus is speaking:
Luke 5:30-32 But their scribes and Pharisees murmured against his disciples, saying, Why do ye eat and drink with publicans and sinners? 31 And Jesus answering said unto them, They that are whole need not a physician; but they that are sick. 32 I came not to call the righteous, but sinners to repentance.
The "old" is referring to those who considered themselves "righteous by the law", the pharisees and scribes.
Jesus made it plain that he was not calling THEM to repentance, but sinners, because they had not hardened their hearts by the hearing of the law and thus were able to contain the New Wine.
I just heard a sermon on this the other day that was very enlightening. When the Solomon temple was being built, the builders had received a stone that was not like the rest of the stones from the quarry and because they couldn't figure out where it went, if it did, they threw the stone away and rejected it. When the Temple was almost built, the need for a "chief cornerstone" was recognized and they sent word to the quarry to produce it, but those at the quarry sent back word that they had already sent the stone. Then the builders realized that the stone that was to be the chief cornerstone, was the one that the rejected.
Christ was sent to be the Chief cornerstone of God's Temple of which Israel, the fathers and the prophets had built, yet He was rejected of Israel. But one day He shall be that great chief cornerstone of both believing Jew and Gentile which make up the latter days temple.
I did not give justice to the sermon, but this was the gist of it.
Blessings,
Dad Ernie