Hebrews 10:29 (CEB)
29 How much worse punishment do you think is deserved by the person who walks all over God’s Son, who acts as if the blood of the covenant that made us holy is just ordinary blood, and who insults the Spirit of grace?
Paul can sometimes be quite "emotional" when talking about Christ and his blood. But I personally don't believe that Jesus died to save us... but rather to lead us to our own salvation, each one individually, becoming "sin" himself (just like us) to the point of being forsaken by the Father. (re: "eloi eloi lama sabachthani")
Before Christ, folks used to sacrifice animals for their sins. (re: the innocent Lamb mentioned above). However, these sacrifices of animals had not saved anyone for real. That's why God decided to send his own son, not to be just
another sacrifice, but to practically drive/lead us out of the country where we now lived (a country known as "sin").
We were not sinners because we did sins; we sinned because we were sinners; i.e. the nature... and that's what he came for. To "Kill" us (well not to kill us really; coz each one of us must kill themselves) but He came to show us how we must die in order to be born again... dead from the previous life of "flesh" into the new life of "spirit". (John 3).
The scenario is simple:
Part A. We're sent to live in Eden.
Part B. We're kicked out of Eden into another country, a country called "sin".
Part C. We're led back into Eden, by Christ, through the passage of Purification/Repentance (a.k.a. the Road of the Cross, or Baptism of Fire)
And as He says to the woman mourning for Him: "Do not weep for me, but weep for yourselves and your own children. [...] For if people do these things when the tree is green, what will happen when it is dry?"
Obviously Christ knew what He was talking about. Back then the tree was still "green"... i.e. the word "God" still meant something. And how about our generation? Is it "dry" yet? So yes, it will be much worse for us, but how much painful, that's a subject for another conversation. But I will just say this: Anyone who beholds the Lamb of God ahead of us, for anyone who keeps looking at Jesus and never leaves their eyes from Him, this person will make it. (Numbers 21: 4-9)
So back to the "blood" chat:
For me it wouldn't have mattered if they had just injured him and sent him to the doctor afterwards, without spilling any of his blood. He did not buy me with His blood; I followed Him simply because the Father led/drew me to Him.
"No one can come to me unless the Father who sent me draws them, and I will raise them up at the last day." (John 6: 44)
For some it was because of the bread He fed them, others because of the miracles He performed, but then for few others, it was not for anything He'd done: feeding the hungry, healing the sick, raising the dead or spilling his blood. There are a few who went after Him simply for what we saw in Him (rather than what he did, though still a very impressive résumé). We saw in Him something special, which drove us to say: "Here He is. We'll follow Him." And so we did, and still walking with Him to this day.