For those of us who love to write sleep can become an optional exercise at best. It’s one of those things people don’t understand. Sure there could be other factors but in the end writers’ brains don’t have an off switch.
I know there are times when people have “writers’ block” but is it that or other factors? When you have other issues going on in your life it can be difficult to concentrate but is that “writers’ block”? Just a thought to ponder.