Personally, I'd never write a descriptive scene where nothing happens, but that's a personal stylistic choice. The reason? They drive me insane! I once read a book, which I will not name because I do not like to disparage other authors, which used such extensive, intensive, and ultimately plot-pointless detail that I now refer to all such extraneous descriptive detail as "grass." Somehow the author in question seemed to have gotten so caught up in wanting to show off her research and attention to detail that she went overboard and ended up with pages and pages and pages (I'm Irish but I'm not exaggerating here) of descriptions of prehistoric prairie grass. Not just in one section, but again and again. It's this sort of thing that advice like this tries to help a writer avoid.
Now, some writers like extensive detail like that - like I said, it's a matter of taste and style. But as a writer and a reader, I need a reason to know what the berries taste like, and what every village elder's name is, and the texture of the bark on each tree in the woods. Advice like this can help to keep us focused on the details that are important, such as cooking is not only a vital aspect of that character, but the flavor of that berry will come into play later in the book - and not just "Look at this neat-o world I made!"
It's so hard on us as writers, especially when we have these huge, developed worlds, to realize that when it comes time to write we can only show off our worlds through the keyhole of our stories. Some writers forget this and get carried away - and that's how you end up with descriptive scenes where nothing happens. That's how you end up with "grass."
I like description, but through the character's eyes