[dkonofalski]

No they don't. I can write a paper or a thesis without any worry about how it's going to look visually to the person consuming it. I can post a video of something without any kind of concern for what size, container, or surrounding content might accompany it.

Content is content. Presentation is how that content is displayed. While they can work together, the content is the most important thing and presentation should always be secondary to it.