The creative process.
The creative process is unpredictable, irrational, and chaotic and it involves a lot of hard work, physical, mental and emotional. The creative process is iterative and it takes multiple iterations to make something that works. In the process, there are multiple things that don't. Each failed iteration gives some insight that makes the next one somehow better.
On the other hand, most of the world, instead, understands the linear, predictable process focused on consumption and obedience. They predict their career path, and they can predict the outcome of their work, much in advance. They are in most cases repeating what has been done by someone before them.
That's why it's difficult to discuss creative or entrepreneurial projects with people who are not involved in the creative process. They are seeking certainty and predictability while the entrepreneur is looking for possibility and magic.