In reality, new business owners wear many hats since they are trying to do everything on their own. Getting involved in so many things at the same time can lead to not paying attention to some critical tasks that can threaten the business's long-term viability.
There is always a learning curve for every business owner in every industry irrespective of how successful the business is. Some business owners or entrepreneurs learn how to run a successful business quite early while some learn the hard way by making mistakes and suffering the consequences.