So if Wilde so detested Fashion (with a capital F), why is he famously linked with dandyism?

FORBES: Paper Dolls, Dandies And Oscar Wilde

It's the exception that proves the rule: Dandyism is not effeminacy.

WSJ: Beau Brummell and His Heirs | Men of Fashion | RISD Museum | By Laura Jacobs

Drawings of James McNeill Whistler, Charles Baudelaire and Max Beerbohm, followed by 20th-century photographs of Le Corbusier, Frank Lloyd Wright and Andy Warhol, make the case for dandyism as an aesthetic stance, the domain of artists.

WSJ: Beau Brummell and His Heirs | Men of Fashion | RISD Museum | By Laura Jacobs