Because they study architecture. The article is profoundly anti-intellectual. This discourse, that colleges indoctrinate people and, thus, cause them to disagree with some form of "truth" that the uneducated masses know.
If the architecture they're studying is divorced from the preferences and needs of the uneducated masses then who cares? They may as well be studying their own butts.
Preferences, perhaps, but needs, I'm sure not. On this, I much prefer being divorced from preferences, than designing soul-less buildings designed solely to cater to preferences, without leveraging the knowledge gained through years of study.
For example, we know now that pedestrian skyways only work in limited contexts and have plenty of downsides; or that a large, concrete windswept plaza is pretty to look at but pretty antisocial and unusable space, and yet you still see this kind of thing in the latest from say Zaha Hadid et al.
It’s why a next wave of architects and planners have coined terms like “bird-shit architecture” that only looks good completely devoid of context and landed from the sky.
Classic butt-guy response.
Often we go out exploring the solution space for new things that were never done before and nobody ever asked for them because nobody had imagined them until they saw the first one. Remember how blown away everyone was with the Jeff Han's multitouch demo? It became immediately obvious it was the future of direct manipulation interfaces.
If you go back further, do you remember how sci-fi pictured the computers we would be using "in the future"? In 2001 there were no alphanumeric keyboards. Neither on the Enterprise. We are finally catching up with the vision of Tron, of the computer as an environment for intelligent agents (it took decades for most people to even formulate this understanding of the movie). We get a lot of things wrong, but our job is to try the things nobody is asking for, because they don't know they can be.