Without description, the reader is left blank, unable to fully understand the subject being discussed. When reading something, there is no way to visualize the setting or the subject, unless the reader is specifically told.
Description helps to put subjects in action, keeping the reader involved in the story. Without that involvement, the reader would move on to something else. And that's not what is wanted.
The feature article I've chosen, A Learned Man Searches for Relevance While Languishing in a Chadian Camp, uses plenty of description.
For an American who only knows modern civilization, it would be impossible to envision the impoverished conditions millions of people around the world face without description.
Here is a perfect example of the technique:
Fighting between the government, rebels and various militias plaguing
eastern Chad has taken place fairly far from this isolated maze of huts
and twig fences, two hours from any sizable town.
Being able to visualize the disorderliness and solitariness of the community instills in the reader the amount of hardship these people live with. It would be impossible to fully recognize the scale of the situation without the description.
Another example is:
A flock of kids waved frantically, like marooned residents of a remote
island, then went back to gathering firewood, hauling water or playing, building
facsimiles of their lost homes out of wet sand. It was food distribution day,
and women carried huge sacks of flour and beans from the backs of trucks. A few
Chadian soldiers were asleep at their post.
This entire paragraph reveals the desperation of the people, something impossible to comprehend without the use of adjectives and analogies.
In a TV generation, Americans have grown accustomed to seeing everything they are being told about. If suddenly forced to read without being able to "see" what is going on, that's a reader that won't be coming back for more anytime soon.
And as a writer, it's a useless proposition to expend effort putting our thoughts and insights on paper if nobody is going to read it.