I think this is a very common problem in any business. If I want to start a restaurant, and I'm a "business guy" I could maybe try to find a "chef" co-founder, which many people obviously do when they start restaurants, however if I know little to nothing about the culinary arts, food preparation, and what kind of cuisines matter to people in a specific area, my "skills" as a business person are of limited utility and give me no competitive advantage over the dozens of other restaurants in the area I'm trying to start one in.

This very same pattern is the same in many other industries, not just software. But I couldn't agree more. Know your domain knowledge.