Writing daily or once a week or on some other schedule is great. It can only make your writing and your commitment to it stronger. But if you can’t manage to sit at your desk with anything like a routine, it doesn’t mean you aren’t a writer. Those who say otherwise are ungenerous and, by the way, utterly ignorant about your life.
People go through periods when they can stick to a writing appointment. Then there are stretches when work, children, relationships, aging parents, illness, other projects, or myriad distractions prevent them from doing so. You might write occasionally, often but in snippets, or not at all (even so, you’re still thinking; something is happening you can use later). Then your life changes: You get a new job, you move, you take a class, you make friends who are also writers (encouraging ones), your kids get older, something in your right brain—or your calendar—just clicks. You rearrange things and find you’re sitting down to write every Wednesday morning or for a half hour before bed every night.
Someone tells you, “I wish I could write that often. Maybe I’m just not a real writer.”
You say, “If you write, you’re a writer.”