There are more jobs in entertainment creative writing than you'd guess. A successful screenwriter, for example, will not only write full screenplays for studios and sell them, but they'll also be hired to revise screenplays. The field is incredibly competitive, so that may turn off some people who would rather make money in a more straightforward way. The upside? Screenwriting is very fun. That's the trade off.
Screenwriting is more a dream example of a creative writing job, so let's talk about what other jobs are available as a creative writer. Practically everything. From speech writing to copy writing to ghostwriting. There are many directions to go. It's a skill everyone should have, but if you excel at it then it's the type of job that can get you a job in practically any modern company.