Writing advice is so often contradictory. Take, for example, the advice to write only for yourself or in service of your vision. But just as often you’ll hear: write with an intended readership in mind.
Neither piece of advice is wrong; they’re just prioritizing different things.
Writers who consider themselves “serious” (or literary) tend to emphasize genius and artistry, which can result in challenging or difficult work. Writers who make a living wage from their work tend to emphasize service to the reader.