You don't turn a creative field into a career or a business until you know that what you want to make is going to be marketable or you are independently wealthy and don't need an income to live. And once you're successful in a creative field, resist the urge to pay attention to marketing data.
A creative who doesn't have the backing of a large corporation needs to lead (i.e. innovate, challenge conventions, etc.) not follow. That's because you can either be better, worse or different than the competition. If you're not different and you have a smaller budget, you will inevitably be worse. That applies to startups and even incumbent underdogs in any line of business.