Yeah, tons of businesses fail because the owner knew how to do the thing that the business does, not how to run a business. Being great at cooking doesn't mean you can run a restaurant. Lots of cattle ranchers are this way. They think their job is to raise cattle, not run a business that raises cattle. "The E-Myth Revisited" is a good read on this topic. So is the thread on this board with the guy who wanted to start a pest control business. He thought a few years of spraying bugs taught him everything he needed to know, thought he was smarter than his boss, and refused to take any advice. He never even got started but while the market and the economy can make businesses fail, many of them are started by people who were always going to fail regardless of all that because they didn't do what it takes to run a business in the first place.