I only know what I know so prove me wrong. I think almost all other forms of art, from music to television and cinema to sculpture and mixed media and painting to dance all have proletarian channels, but fashion is almost exclusively for the wealthy. Arguably also it seems to me that a lot of culinary art tends to cater to the wealthy too, so fuck that as well.
The fashion industry is largely bourgeois, but like most things the culture and style is just ripped off of what the working class does.
The cycle always seems to go: Working class dresses a certain way -> fashion industry appropriates the style and charges $2000 for it -> working class dresses a different way -> fashion industry appropriates the style and charges $2000 for it.
Bring back cloaks dammit.
Be the change you want to see in the world.