A published article is not a completed deliverable: it is a position taken that has to be maintained. Good content ages, gets overtaken by better content and loses relevance when the market shifts. Mature operations dedicate part of their capacity to updating what exists, not only to producing the next thing.
The second difference is who writes. Content competing on technical subjects needs information that only exists inside the company — from sales, from operations, from the people who serve customers. The advisory role is to extract, organise and turn that into publishable material, not to substitute it with generic text.