is it writing? is it art?

(They say, find a day job, write on the side, support yourself until you are so successful that you can quit your day job. But they don't take into account that writing takes a huge amount of creative, mental, and emotional energy - all of which your day job can drain out of you. What can you produce that is good, that is full of heart and soul and story, after a long, tedious, dry day of work? Those who say that are practical, but where does practicality come in to writing? Writing is an art, and does art leave room for practicality? Or is it something deeper, more innate, more in tune with nature - wild, raw, free - the need for expression?)