The simple answer is that you need to ask yourself why somebody would pay for what you create. This leads to thinking about market demands, user experience, etc

The simple answer is that you need to ask yourself why somebody would pay for what you create. This leads to thinking about market demands, user experience, etc., and you will learn to argue from the customer’s and user’s POV. Then again you’ll ask yourself why you’re not self-employed because you’ll realize most of your managers aren’t good at this stuff either.