That's a hyperbole, certainly, but it makes a nice tag line. In all seriousness, writing demands an attention to detail, an exclusive concentration that can become otherworldly and ultimately devastating. The myth of the writer as some sort of withdrawn, absent-minded dreamer may be an exaggeration, but it is based on the absolutism of the craft. To choose to inflict the sort of torment writing can be indicates some level of loose wiring. The only explanation I can see is that over time the process of creating becomes so intrinsic to self-definition that not doing it is harder than the act itself.
Writing can be parasitic.
It has an insatiable appetite for time and tears. But I wouldn't like the person I would become if I didn't write. It's a harsh game, and inevitably one the writer either loses or quits. I don't think there is a middle ground. Talk to me about your work schedule.