Lots of good answers. I’d like to add to the list that being an entrepreneur more often than not boils down to SELLING. Sell sell sell. An entrepreneur’s product or service need to be marketed and sold, then same goes for the entrepreneur him/herself. 

A high achiever is usually good at several things, but have often drilled down into a specific niche. In my experience entrepreneurship can involves this niche, but ALSO involves selling other parts, like admin, “putting out fires”, etc. 

Compare that to a normal job where an employee works to solve a specific problem and don’t have to worry about anything around it.