I was told while attempting, and failing, to grow up, that if I wanted to be a writer, I had to "experience life," which meant be exposed to a variety of different jobs for background material. I believe this is a valid point, at least from my own experience.
Here's a (partial) compilation of different kinds of work I have performed over the centuries: morning paperboy, corn detasseler, stockboy in California liquor store, shipping department in women's dress factory, rotocast operator in auto parts factory (made arm rests, head rests), Chaplain's Assistant in USAF (Republic of Philippines and Hanscom Field, Massachusetts), bar back in Officers' Club in Germany, grapefruit harvester on Kibbutz Y'fat near Nazareth, Israel, insurance sales (I hated sales), Teaching-Parent in community-based therapeutic group homes in North Carolina, consultant/trainer/evaluator for such group homes, English professor, and professional writer. I have also milked Bulldogs, but that's another story.
Did all those jobs help me become a better writer? Yes, I think they did. Wide exposure to different people, cultures, and countries is a great education. So, yes, I do recommend a variety of experiences for writers. I do NOT recommend milking Bulldogs, however.