Most entrepreneurs, whether doctors, dentists, coaches, speakers, real estate investors or whatever industry they are in, can’t scale unless they do all the work and micro-manage every part of the business.
As a result they are working 'in' their business rather than 'on' their business. This is why they can rarely scale. They have a passion for their business, but hate what they are doing. The bottom line is that they have zero exit strategy and as a result, they can’t fully enjoy life and the fruits of their success.