If business owners, taxi owners, hotel owners and others who claim to be working for themselves need to depend on customers and customer satisfaction for profit, that is to be able to get money from them, are they really working for themselves?
Maybe the people who are actually working for themselves are those who do not need people or to satisfy any customer to make profit, example like the traders who do not need to lure customers to their shop like business owners or hotel owners, or taxi owner that need to follow instructions from their clients etc.
What could be the real definition of working for yourself?
Well, if you bring your reasoning to a logical conclusion, then the only ones who really work for themselves are drug dealers (the product sells itself) and prostitutes (there is always demand). In fact, working for yourself means that part of the value created by your work is not spent on maintaining a boss, as is the case in large organizations. That is, you are your own boss.
In any case, both a corporation and an independent entrepreneur depend on customer demand, but do not work for customers. In other words, you are working for someone who takes the surplus value (or, more simply, profit) for himself. If it's a corporation, then you work for a corporation. If it's you, then you're working for yourself. But these are definitely not customers, they don't make a profit.