I think a large part of the YLF membership is comprised of people who just want to look nice and put together before leaving the house every day (a perfectly worthwhile goal, to be sure). For their purposes, high fashion isn't really relevant. Out of all of the fashion outlets I pay attention to, YLF is definitely by far the most down to earth and I can completely see why the majority of the readership doesn't care for "fashion" as opposed to clothes.
I also think, at the risk of sounding condescending, that a lot of people really understand the fashion industry and how it operates, and take it as a personal affront when they are "left out." You see this any time a "why are ramp models so skinny?" or "why don't they design clothes I can wear?" discussion comes up. I don't think the fashion industry alienates people nearly as much as it gets accused of doing. I think people choose to alienate themselves.
For someone like me, who has goals beyond just looking pulled together, I find high fashion and trend forecasting very valuable and inspiring. These pictures are just that: inspiration. It is YOUR job to translate these looks into something that works for you. Many women don't want to be bothered taking the time to do that, which is fine. That is why magazines, image consultants, and style editors exist.