Let's Play Monopoly!
Ideas that are honest and free to compete with other ideas will give the most benefits to a society. The less freedom there is to compete, the more a government or business has coercive monopolistic control over the private interests of individuals.
People with the idea of a natural monopoly being evil is derived from the envy of many high status businesses in the marketplace. They do not know how a business achieves success without government intervention through effort, ambition and persuasion. The refusal to think about how to compete with them causes a lazy desire to control them from future successes, which creates the idea they use unfair practices and policies against consumers and their trading partners.
Businesses can be destructive when they use dishonest career politicians to create laws and restrictions against their competitors. This creates stagnation, higher prices and lower quality products. Coercive monopolies, by their nature, cannot exist in a free-market without the help from restrictive laws and regulations.
Politicians can be destructive when they make deceptive promises to their constituents and lie about their opponents. This creates a corrupt government, higher taxes and less self-responsible individuals. Dishonest career politicians, by their nature, cannot exist in an honest government without the help from deceived or greedy voters.
Businesses and politicians will benefit a society most when others are allowed to honestly compete with them. This verifies if their actions are in accord with the natural free-market forces of supply and demand. Natural monopolies, by their nature, are what happen when the open and honest practice of persuasion out-compete all others.