Unfortunately, I've been close to a couple of companies where the founders, while they did have the original drive to create the company, have no idea how to manage a business. These are companies founded by 23 year old kids with no management experience or really anything other than some college - like many tech startups. The company cultures have needed up poisonous, the companies have no structure. Customer service and general organization is abysmal and it's visible from the outside. So, not all founders should be CEOs.