Let me see if I understand you.
- This person needs to ask if they're making a mistake, which indicates they don't know what they're getting into.
- This person needs to ask why their game has so few downloads. This indicates they haven't studied the market or read the hundreds of post-mortem analyses that discuss the risks of creating video games.
- This person is giving up a job with a secure salary to pursue a dream, without knowing the risks or the reality of the field they want to enter?
And you're telling me you don't consider that a bad decision?
And by the way, I'm not talking about ALL startups or ALL entrepreneurs; I'm talking about this specific case and based on what they've asked.
EDIT:
And by the way, what I meant by mistake was quitting their current job, that is, jumping headfirst into making a living creating video games without a safety net. I made it very clear in my first comment that they should NOT quit their job, but create their video game in their spare time. If their game is successful, then he should quit their current job, NOT before. That's what I meant by the mistake, and that's the question they posed in the title.
That has nothing to do with innovation; it has to do with using their head when venturing into a market that is new to them.