yes that's true, but then many artists dream of being Hirst/Picasso/da Vinci, making something public is always an act of ego.
These RPG makers just not very good at their art. Or actually they are good, but terrible at market research because they want to be valued for a creative output that is disengaged from what people need. Wholly valued in its own right. Which after the first wave of a product type never happens.