Plenty of people have what seem like solid game ideas and are passionate about them, but don't get anywhere because making solo indie games requires a decent level of proficiency at a ton of vastly different skills (coding, design, growth hacking, etc). Plus, the gaming sector is extremely crowded and competition often employs unethical tricks (psychology manipulation, etc)

It's much easier to focus on the wrong things when developing a game, because there's so much to do, and there's always yaks to shave. And while one's "following their passion" of coding, they might be neglecting other crucial aspects of the project.