Business success isn't a function of technical/artistic quality in any field. There's a loose correlation sure, but there are hundreds or thousands of examples where poorly written/made books, TV shows, music, films, games etc also did really well commercially as well as the opposite. Many would say something like Firefly is better than something like Twilight, but one made millions of dollars and the other got cancelled in two seasons.

Knowing what to make and who to market it to will usually matter a lot more than how you build it.