What is only god knows why?

"Only God Knows Why" is a song by American rock musician Kid Rock. It was released in 1999 as the third single from his album "Devil Without a Cause." The song features a mix of rock, rap, and country elements and has been described as a reflective ballad about struggling with depression and finding solace in spirituality. "Only God Knows Why" was a commercial success, reaching the top 20 on the Billboard Hot 100 chart and earning Kid Rock a Grammy nomination for Best Male Rock Vocal Performance.