I think this is the common mistake. Making games is easy. Making a living making games is incredibly hard. Substitute "art", "music", "fiction", etc for "games

I think this is the common mistake. Making games is easy. Making a living making games is incredibly hard. Substitute "art", "music", "fiction", etc for "games". As the article says, making stuff that satisfies your creative itch and also appeals to a mass market is like getting hit by lightning twice. But as you say, this needn't be a discouragement for people who really want to try it. Because it's mostly luck whether your creative itch aligns with what people want to buy, so there's no harm in trying your luck. For the rest of us, it's either the long meaningless slog of creating stuff we're not interested in creating but people are interested in buying, or of doing something completely different to make money while keeping the creative hobby.