It would have been not only wise, but the right thing to do, if substitutionary blood atonement were an ESSENTIAL CONDITION to be forgiven and transformed.
Now, Jesus had mentioned his future death to his disciples... but as something that would prove that He was the Messiah
In fact,
after resurrection, we have evidence that
- the disciples saw no connection between Jesus death on the cross and substitutionary atonement
- Jesus did not correct them, nor framed his death not in the context of substitutionary atonement. Instead, he explained it in the context of fulfilling the prophecies that identify Him as the Messiah... and a victorious one.
In the road to Emmaus, listen to what the disciples thought
“The things concerning Jesus of Nazareth, who was a Prophet mighty in deed and word before God and all the people, 20 and how the chief priests and our rulers delivered Him to be condemned to death, and crucified Him. But we were hoping that it was He who was going to redeem Israel."
In the beginning, for the disciples the death of his Master was a sign of an aborted messianic mission... a defeat. They were not happy thinking that now sins of men could be forgiven.
Let's look now how Jesus replies:
“O foolish ones, and slow of heart to believe in all that the prophets have spoken! 26 Ought not the Christ [The Anointed, The Messiah] to have suffered these things and to enter into His glory?” 27 And beginning at Moses and all the Prophets, He expounded to them in all the Scriptures the things concerning Himself."
Jesus talks about his death as a step foreseen by the prophets that proved He was the Messiah, the victorious King of Israel. His death had not been a defeat, but an undeniable sign of his victory.
Israelites had been seeking and receiving forgiveness from God for centuries, without any Messiah's blood. So Jesus had no news to share about it. It was same old, same old:
STEP 1. The sinner repents and wants to change
STEP 2. God forgives and grants that change