“My ways are not your ways, says the Lord.” Is it true?

This is a true Scripture that is generally quoted out of context in order to assure people that there’s no point in asking why someone is sick, or died, or why their prayers weren’t answered.
“For my thoughts are not your thoughts, neither are your ways my ways,” declares the LORD.
“As the heavens are higher than the earth, so are my ways higher than your ways and my thoughts than your thoughts.
Isaiah 55:8.9
This is God’s lament—not his plan. God lamented that the Israelites didn’t forgive like he does. Now read it in context:
ISA 55:7 Let the wicked forsake his way and the evil man his thoughts.
Let him turn to the LORD, and he will have mercy on him, and to our God, for he will freely pardon.
ISA 55:8 “For my thoughts are not your thoughts, neither are your ways my ways,”
declares the LORD.
ISA 55:9 “As the heavens are higher than the earth, so are my ways higher than your ways.
and my thoughts than your thoughts.
God was addressing evil people, who wouldn’t forgive. This is certainly not his plan or desire for Christians to have evil thoughts, especially since we have been given “the mind of Christ” (1 Corinthians 2:16) and we are to walk in all his ways or steps (1 Peter 2:21).
If you’re a follower of Jesus and the Lord’s ways are not your ways, why not?