Lots of people want to have written; they don't want to write. In other words, they want to see their name on the front cover of a book and their grinning picture on the back. But this is what comes at the end of a job, not at the beginning.
At certain historic moments, grandparents took on childrearing responsibilities. In many cultures, they still do. Chinese grandparents who are able to retire at 55 are seen all over Beijing bouncing grandbabies. In the United States, we can't afford to retire at 55.
As a producer, you're pretty much creating a body of work that an artist has to stand behind.