It's not wrong when you say it like that, but usually when someone who already has a certain skill and he can develop it into a business slowly, of course that person will not think about working for someone else but will work with himself and try to build his business to be wider. Because after all working for someone else will have very little freedom that we can get so that sometimes it can be very disturbing for some people who already have certain abilities and also the time to make something important in their own lives.
But the purpose of a business is still for others. Either we sell products or sell our skill for other people and that is how they pay us money. It is still different from working on an office or on a department store where we can only earn a fixed income overtime. So it is still better than them.
There might only be a difficulty sometimes, especially if we are still starting but we shouldn't budge by it, as it can only pass through. Whatever type of work it was, all must work for themselves which includes proper grooming for example, so that we are presentable and that makes our costumers or our bosses to be impressed with us. We don't know, what if they will promote us later on? Or as a customer they will keep on coming back for more and gave us some tips (money).