Betting so much of one's soul into a consumer play is a risky decision. The pay-outs are huge, but the odds are enormous, as bad as a lottery. Consumers decide to use a product based on intangibles; brand recognition, emotions, entertainment. These are fleeting, like fashion, and for an entrepreneur, hard to pin down what works and doesn't. There is no repeatable model for us to experiment and learn from.

Businesses on the other hand are considerably more rational. B2B decisions are made based on value. Even when a deal doesn't go through, you get tangible data to see why. But make yet another photo-sharing app and no one uses it? That's a lot more harder.