You are missing the point here. Even though the people looked to the serpent and lived...they still perished in the wilderness through unbelief. Don't make a simple look cover up the hard bitten rebellion of the outer man. Go to the cross...or you will likewise die in your sins.
Stop just looking and GO to the cross.
Wrong go to the Resurrection !
1 Corinthians 15:17- And if Christ has not been raised, your faith is futile; you are still in your sins.
The passage declares if Christ is not risen, raised from the dead, resurrected then our faith is in vain and we are still dead in our sins.
We are saved by His life/Resurrection not His death. His death atoned for sin but does not give life.
Romans 4:24-25
but also for us, to whom God will credit righteousness—for us
who believe in him who raised Jesus our Lord from the dead.
25 He was delivered over to death for our sins
and was raised to life for our justification.
Paul declares in
Romans 5:10 the following: For if, while we were God’s enemies, we were reconciled to him through the death of his Son, how much more, having been reconciled,
shall we be saved through his life! Cf Acts 17:31.
hope this helps !!!