I'm pretty low on the Fashion-interest scale relative to some, but it's not nil or I wouldn't be here.
I like caro's Style vs. Fashion comparison, but even those are linked. When we say "my style is evolving" that occasionally is true at some bedrock level, or maybe for some of the more basic descriptors--girlie vs. tomboy; dressy vs sporty; high-contrast vs. low.
But a large part of "style evolution" is informed by FASHION--if not, no one would be evolving toward pointy toes one year and Birks the next and cropped this or fluid that, and short blazers one year and longer ones the next and on and on. These are all things that start to LOOK different to us over time as Fashion changes.
So one year something starts to seem appealing for some reason--why then and why not 3 years ago? Well, for one reason if you buy retail and don't design and sew your own clothes, your options are what's in the stores and so you'll be choosing from that. But some items are actually still available but we move on. And in the reverse, I've sometimes hunted for a certain style skirt or pants in re-sale shops because I thought that worked for my style even though it was not supported by current Fashion (sometimes learning that I really wanted 2 things--something about the fit or fabric that was no longer available, but wished it were available in a "modern" or tweaked construct.)
So Style vs. Fashion may mean, my Style requires choices and I will focus on these Fashion items this year.
Dressing I think of as being more occasion-driven and lifestyle driven, so in general the percent of that would be more ordinary. But there's room for higher "levels" of Fashion there, too.
My personal tendencies are to see "big Fashion" as often costume-y,as I'm more conservative by nature and I know I don't have a good eye or appreciation for what it means as a creative thing, or that it's a way to get from point A to point B without having to explain itself.
So if someone were to show a WIW with a large headress thing,or something with wings or flaps, for example, I'm likely to go, what on earth is that! Instead of, ooh, I like those cool colors and textures, and that looks amazing and gives me an idea for how to style my T-shirt! Angie calls that my narrow style filter, but it could be a Fashion filter. This does limit some of the posts I'll reply to. because I think it's not considered polite to say, that looks very weird on you --what is your goal here? But hey, at some level it's all just clothes and if we look through history, people have worn the weirdest things when we look at them with our "today" eyes, but it didn't seem so at the time. Or even currently, in different cultures.
I like to think that I have gotten a bit more open to it, if not for immediate additions to my wardrobe, but for the reasons above--good things might come from observing and appreciating it, the way exposure to all sorts of creative arts can be. Plus circling back to how I started this post, it's all a continuum, just more or less of something.