>>7222328She's had multiple international exhibits, including one at the Costume Institute at the Met in NYC, subject of multiple documentaries, featured on a ton of prominent news sites and prominent fashion magazines, her style has been the inspiration for Barbies in the past although indirectly and not collaborations, constant fixture at Fashion Week, plus a constant social media presence both with her own publications and trendy blogs, etc.
I don't expect everyone to know her--or anyone in the fashion industry, there are always blind spots--but it's not like Barbie picked some random person to collaborate with.