How can ghostwriters help in writing content or marketing?

Marketing is one of the most important aspects leading a business to its success. Content marketing is an important part of marketing where professional writers create content for the success of a business. Marketers hire professional ghostwriters to create content and a primary reason for that is they are professionals who are knowledgeable about various styles and types of content used for marketing. From creating blogs to writing scripts for videos, ghostwriters are experts in producing creative content for marketing. Do you think it is necessary to hire a professional for content creation?