As a thought-experiment, replace fashion by typography. Imagine you wake up, and you have to think about typography, then you get to work, people talk about typography, you come home and turn on the TV, people talk about typography, then at some point, it becomes too much. Personally, I'll probably still appreciate the craft, but I consider it a "solved" problem for myself, something that others deal with, and I direct my attention elsewhere.
As for the communication aspect of clothing, that's actually something I have resentment against. You change clothes only once or perhaps twice a day, so the communication is extremely low-bandwidth to start with. And an even bigger problem: it reduces the person to one thing. A person wearing a pilot suit becomes a pilot (only), a person wearing a labcoat becomes a doctor (only). But obviously people are more than their profession.
And clothing can also be a way to intimidate or to mask intentions (think of the used car salesman wearing a suit, not because he likes it, but because he wants to sell that car).
(On the other hand, we do see an awful lot of criticism of UI design and that includes complaints about typography :-)
Again, you may not value these things, but the vast majority of the world does. One of the things that I struggle with from fresh graduates out of technical schools is that they don't value it and it hurts them professionally because their peers and management do. That might not be right, but until one becomes the boss, it's important to understand and effectively utilize this language. I'd feel pretty stupid if I didn't reach my professional goals because I didn't value how I dress sufficiently enough. And, yes, there's a limit to how much it matters just as there are limits to all language. Though, that doesn't minimize its impact.
With respect to the article, the physics and modeling of fabric is incredibly difficult. Part of the reason that clothing manufacturing hasn't been as automated as other fields is a testament to how difficult it is. Personally, I find such models fascinating.