Jesus is NOT the Passover lamb. Jesus is prefigured by the Passover lamb.
The prohibition on drinking the blood of the lamb signified that the life of the lamb came from God and belonged to God.
The command to drink the blood of Jesus signifies that Jesus’ life does NOT belong to God any longer. It belongs to US because Jesus gave his life for us. Thus, his blood—the symbol of his life—also belongs to us. He TELLS us this precisely by commanding us to drink his blood.
To refuse to drink the blood of Jesus is to refuse the gift of his life that he wills to give to us.
To cling to the law of the Old Covenant is to refuse the gift given to us under the New Covenant.
If any of this had any actual Scriptural basis, you might have a case. But since your only support for your statement is church tradition, it doesn't have much validity.
You still haven't addressed how or why Jesus would command His disciples to sin according to the Law of Moses, yet still be able to be sinless and able to be our Savior. Remember, Jesus Himself said He did not come to abolish the Law, but to fulfill the Law. How could He fulfill the Law if He is breaking the Law???
The Lamb of GOD!