For sure. Certain subcultures have aesthetics that are not started at the top. However, these subcultures at times could be thought of as culturally elite (and very much adored by upper class tastemakers) and their fashion in some cases manages the same derivative cycle. For instance, “Grunge” culture which had an aesthetic that was very much not haute of course. But it was culturally elite at the time and very quickly their styles were derived for mainstream consumption. But even so, haute will deconstruct the parts they like, integrate it, and so it passes.

Other subcultures of course never break through.

Regardless, most clothing is purchased from retailers that mass produce things. You could probably tier rank them accordingly from designers to boutiques to small retailers on up to big box shops that you can find anywhere.

You see the same thing in other cultural artifacts like cuisine. Haute Cuisine doesn’t start every trend but it isn’t afraid to discover something outside the mainstream, riff on it, and then it works it’s way into the middle.