You can’t get cute when you read Isaiah 11. We live in a world with a dreadful abundance of human predators of all kinds. Predator nations, individuals, institutions, and societies … bent on destroying the vulnerable. When we make ourselves vulnerable, we are going to get hurt.
To those stuck inside a closed system it seems completely unrealistic, but Jesus came from outside the system… a new frame of reference.
And as Christians we cling to God’s vision of the kingdom… but we know what we are living w/some wild beasts… teeth & everything.