Except that you read that scripture as a prophesy that some will be saved and some will be destroyed.The idea of universal salvation, that everyone will be saved and enjoy eternal life, does not find support in sacred Scripture. Genesis 9:11 simply records; "Yes, I establish my covenant with you: Never again will all flesh be destroyed by the waters of a flood, and never again will a flood bring the earth to ruin." This is not a promise that no one will be destroyed, but simply that a global Deluge would not reoccur. Jesus Christ himself warned; "Go in through the narrow gate, because broad is the gate and spacious is the road leading off into destruction, and many are going in through it; whereas narrow is the gate and cramped the road leading off into life, and few are finding it." (Matthew 7:13,14)
Why not read it this way for a change?
The sheep are TO everlasting life because they learn to be no part of the word, they seek יְ֭הוָה for peace and they put on love for even their enemies.
The goats are they that cause destruction because they refuse, willingly or unwillingly, to walk the Way, the Truth and the Life.
Walking with Jesus is for life. You yourself say there is only one other way. They are called goats who are walking the way to destruction. Matthew 15:14