Things don't always work out the way you thought they would. In fact, it rarely ever does. The problem with deciding to go into business is that by default you're signing up for uncertainty.
There's never a guarantee that things will work out fine. Actually, there's a much higher likelihood that it will all go wrong.
So when you decide to go into business you're actually deciding to become a problem solver. Figuring out how to push the product, how to reach the consumer, how to make the sale, how to earn a profit, is all part of figuring out how to solve problems.