I used to be that way! I used to have no hobbies other than work and more work. i even worked so hard that I would rarely eat- and as a result ended up with no blood pressure and spent two months in the hospital. Was it worth it? I got a degree, so that was nice. But now I'm old and I want a life of joy.
The nice thing about taking breaks is that they help to inform your work. How can you write about life if you deny yourself one? It's a common idea that artists need to work themselves to death, but there's a lot to be said for living simply, frugally yet pleasurably with the ability to say no to projects that will harm you. It's not sustainable else wise, and it's not good for your work either.