Why is security important for organizations?

Organizations are typically focused on executing on their mission and taking care of their customers' needs. Security often feels like it is an unnecessary overhead, it actually slows one down from being able to focus on the core of their mission - kind of feels like brakes on a car. How fast would you go in a car without brakes? It turns out that security (like brakes) does slow you down, but also is the reason you are willing to go fast.