The thing I find hard about being a writer is that, in between all the busy-ness of daily life, and day jobs, and parenting, and running a small business (which is effectively the kind of approach you have to take, if you want to have any kind of creative career), you just can’t stop thinking about it.
The story, I mean.
So much of writing is in the thinking and day-dreaming, and when you’re busy, quite a lot of that has to happen in the margins. This is why writing, as a career, has traditionally been done by the upper classes. Their margins tend to be considerably larger.