Why called controllable marketing mix?

Marketing mix is controlled by the business, company or owner because they essentially own the product so they can control all aspects of it. How its made, packaged, labeled, designed, shape and size of item. They also decide how much they wish to sell it for, how they will distribute and promote their products. Owners might hire people to help make these decisions, but ultimately the owners of the product are the only ones that can make those decisions, which makes the marketing mix (product, price, distribution and promotion) controllable elements.