It's capitalism. Running a business requires your undivided attention for long time. Unless you are extremely lucky, you can say goodbye to private life.

What makes you think you can be more efficient at doing what you do than dozen of other people in your area who are doing this for decades now? You won't be. So you need to make up by spending ungodly amount of time on this. Have you seen a business owner working 3-4 hours a day just after starting their business? I doubt that. That's how much I worked right after finishing my education, and I made enough money for comfortable life.