How are Unions "organized Mafia" (btw, Mafia, by definition is "organized crime") yet organizations like the Chamber of Commerce and other "business association

How are Unions "organized Mafia" (btw, Mafia, by definition is "organized crime") yet organizations like the Chamber of Commerce and other "business associations" are not? Why are businesses allowed to "organize" and "influence politics" (Citizens United decision anyone?) yet when a union does it, it's considered somehow theft from workers and "socialist". If capitalism is about regulated free markets, then why is a regulated labor market not "free"? Unregulated markets are both anarchic and lead to oligarchic and monopolistic behavior, as can be seen in areas like big tech etc. Capital "vs" labor is by definition about labor attempting to extract as much of the profit of their labor as they can, while capital will be working to achieve the opposite. To ensure that this is at least managed, a regulated market, with an impartial regulator and legitimate market laws is required.