One of the things I love most about writing is it keeps you on your toes. There is always something to learn. For my flash fiction, I am always inventing new characters to write about. So the chances of (a) being bored or (b) running out of things to write about are zilch. I like that!
And for non-fiction work, such as my posts here, there are always topics of interest to look into, research, and write about. It is also a joy to share local author news (and a nice bonus when I can include myself!).
Being stretched mentally, whether you’re writing or what have you, is good for you. It makes you think. You develop much more as a person and I am sure that is one of the unspoken roles of any of the creative arts.
Taking part in any of the creative arts will make you assess where you are, where you might like to head with your chosen form, and so on.