Indeed it does say "6-10" in the graphic. What I'd like the graphic to say instead is "6". "6-10" isn't even accurate. The Scaling Adventure bar doesn't scale to this range. It scales around the actual level of the adventure. If they'd just print the actual level of the adventure in the graphic, I wouldn't have to read the first paragraph. If I wanted to run "Zenith Trajectory", and I looked at the graphic (6-10) I might think
I could scale it to a 10th level party. I would be wrong.
A half-column doesn't sound like much, but split amongst 2 or 3 adventures, that's a page. Remove the intro sections, and thats another page. That's a lot of space for content. Faces of Cauldron, Critical Threats, Maps of Mystery, or a major encounter could fit in this much space.
I'd rather have content than extra convenience.