Writing every day is an excellent way to grow as a writer. It is practical to write every day since you can recognize your mistakes throughout the day on how to improve. But I guess what makes it crappy would be that "productivity guilt" of not writing daily. That would make it wrong. So, it is good to write every day, but at the same time, when you're in your state, you shouldn't push yourself to write. It's time to take care of yourself.