Could be? Try would be, should be, must be... Anyone who is going to write a story about it would care. Heck, some people will care anyway, and that's okay, too. Flavor text is by no means the most important element of a game, but it certainly is an important one. People do care about the details of the setting they're in, and if some people care more about biology than rocket tech it's not exactly your place to tell them they're wrong to do so. Not everyone is looking for the exact same thing here.
No, could be. As you yourself say in the very next sentence, it depends entirely on the type of story someone is interested in writing. The vast majority of stories, regardless of genre or intent, will not particularly incorporate the ecology into them. Period. Now, certainly, they
could, because fiction is infinitely malleable and just maybe the nature of Space Cows will have some bearing on the plot or characters (see also: Waterland and eels), and I can think of a large variety of fiction set on Earth which does exactly that (see previous), but for most people who write on these forums? No. They write about talking heads usually, and I don't mean the band. There very well could be someone who, in a high stakes quasi-futuristic space game of geopolitical intrigue, wants to do a mashup of slice of life and Western on a Space Cow farm, but odds are probably not.
As to the Space Cow itself, if it isn't edible, it's going extinct. If it is edible, it had probably better be tasty and economically viable (i.e., why we don't usually eat predators), or the same thing will happen. This goes for every other form of life too, by the time an advanced and self-sustaining 21st century level global economy is operational enough to fight with itself. Maybe your characters wind up in a downed vertibird in a Space Cow field or something. But probably not.
Kinda like how NES doesn't see a lot of stories about the intricacy of tuna fishing, whaling, ranching, or herding, despite their historical importance and continued practice into the modern day. They scarcely even pop up in Fresh Starts. Wonder why.
Again, you
can do whatever. That doesn't mean it makes sense for Kozmos to drop everything and focus on ecology as a super-amazing-important aspect of his setting, because it
isn't.