The government also requires certain professionals such as doctors and lawyers to pass exams before they can practice. Businesses must pay taxes and minors have limited work hours. Freedom of choice means the buyers choose what should be produced. Whether buyers purchase a product or not decides if their product will be a success or a failure. Our economy allows the ownership of private property.
Citizens are free to buy whatever they choose and control how it is used.
When you own a business, the profit you make is yours. The profit incentive is what keeps our economy alive. It is the desire to make a profit. All investments in the business world, whether it's time, money, skills, etc., are made with the idea of making a profit. The downside is that there is also a chance of losing money.