Hebrews 4:15 >
"For we do not have a High Priest who cannot sympathize with our weaknesses, but was in all points tempted as we are, yet without sin." (Hebrews 4:15)
To be "tempted" can mean to be tested.
You are saying that Jesus could get no understanding of what it is to be human; yet, Jesus did not sin; so Jesus never experienced how it is to give in to sin . . . to be ruled by "the spirit who now works in the sons of disobedience" > in Ephesians 2:2. But Jesus does know how we are in our sinning, even though Jesus has never sinned; plus, Jesus has gone through things which we have gone through but He did not sin. Because in His character Jesus is almighty and all how love is, by nature, meaning how God is in love.
And God's grace almighty made Jesus able to succeed so well. This is our example to follow > to submit to God in His grace almighty with His creativity for how to love each and every person while being pleasing to our Father. We can love while not being hurt and not giving in to temptations, if we follow the example of Jesus.
And how Jesus loved on the cross is our example >
"And walk in love, as Christ also has loved us and given Himself for us, an offering and a sacrifice to God for a sweet-smelling aroma." (Ephesians 5:2)