I would think whether and how much and what kind of music will help will vary quite a bit from person to person. Me, I like listening to all manner of music while drawing or painting, but not at all while writing, whether the music has lyrics or not.
To me, almost all music has a certain narrative feel to it. This is doubly true of large scale classical music, particularly movements written in sonata from. I cannot dream up my own story while listening to Beethoven’s playing in my ears. It’s like trying to count while someone calls out random numbers.