If they had a day job, they'd still be writing songs, and think of it as the most important thing in their lives. The fourth trait is that they all write their songs using commercial song structures. It's Not A Birthright. I'm convinced that nobody is born with the ability to write hit songs. They may be born with a tendency, maybe even a gift, but nobody comes out of the womb as a hit songwriter just waiting to grow up.
People learn how to write hits.
Just as they learn to drive race cars or become brain surgeons. By following the advice of that late-night infomercial guru, Tony Robbins. Diane Warren writes nearly every waking hour of the day. If she's not writing, chances are she's in the studio demoing a song. She doesn't finish a song unless it looks like it has the potential to be a hit.