I think an advantage Writers could have is that you can basically write on any hard surface and with a pen, pencil, quill, chalk etc etc and it’s easier to Write wherever you are than… Paint? of course it also depends on the complexity of your story and its length, but even then it’s easier to carry around a notebook and a pen and write wherever you find yourself than….. needing a canvas+brushes+paint(+cleaning afterward+not mistaking the dirty-with-paint water cup and the coffee cup) that is.. an advantage, surely
And they can also set your house on fire. Who needs artistical powers when you have good old weapons and fire (except if the fire *was* started by Writing..? What. hm, imma drop the idea straightaway but I’m still as curious as to how the Writers’ power works and differs from the Painters’)