No, Frost was a teacher and a farmer to make money.[1] Tom Clancy was an insurance agent.

[1] https://www.britannica.com/biography/Robert-Frost

Was thinking of T.S. Eliot

Wallace Stevens

https://en.wikipedia.org/wiki/Wallace_Stevens

Just took a look at Wikipedia. No mention of insurance, but he did write much of his early work while farming during the day. As did Robert Burns.

Was thinking of T.S. Eliot, worked at Lloyds but in banking not insurance.