Every time you say something, the goal is not to expound the entire truth of the universe. Sometimes you say things to motivate a person, or to help them focus, or to poke a person so they'll do what you want them to, or maybe you just want a laugh. As mentioned, prerequisite to any success is that person does the hard work of getting started and making study and practice a habit. It is essential. The goal then is not to speculate about what makes commercial games monetary successes. That's way out of the ballpark.