Is it necessary to be a starving artist?

Dear Literary Ladies,
It's so hard to make a living at writing these days. There used to be so many more paying outlets for short stories, essays, and sketches; now everyone expects writers to contribute free content. How did you manage to earn a living while building your reputation? Do you think it's necessary to be a "starving artist" until one's ship comes in?

I always took little dull jobs that didn’t take my mind and wouldn’t take all of my time, and that, on the other hand, paid me just enough to subsist. I think I’ve only spent about ten percent of my energies on writing. The other ninety percent went to keeping my head above water.

And I think that’s all wrong. Even Saint Teresa said, “I can pray better when I’m comfortable,” and she refused to wear her haircloth shirt or starve herself. I don’t think living in cellars and starving is any better for an artist than it is for anybody else; the only thing is that sometimes the artist has to take it, because it is the only possible way of salvation, if you’ll forgive that old-fashioned word. So I took it rather instinctively. I was inexperienced in the world, and likewise I hadn’t been trained to do anything you know, so I took all kinds of laborious jobs. But, you know, I think I could probably have written better if I’d been a little more comfortable.

—Katherine Anne Porter, The Paris Review Interviews, 1963