I think it's pretty widely and well known that the Fashion industry uses drugs like we use sugar in tea lol, it's not surprising to anyone but young conservative kpop fans.
Same with that particular LA crowd. The Weeknd literally sings about drugging girls and passing them around his friends/Simi Haze/The Jenners/Jaden Smiths crowd and that whole church service thing is rampant with casual coke use. Maybe even heavier substances.
Doesn't mean she was doing it at all. She's a grown adult, her job is to be a musician, not a Jesus level moral figure lol.
And her own fandom started it, and Tisci deleted for a reason. That's the man that was running around with Kanye back in the day and partaking in lots of "fun". Fans just need to let it lie.
And saying her family are lawyers is hilarious. Do people not realise that coke nowadays is so common pretty much everywhere? I knew kids that did it in high school lol. It's not really taboo anymore apart from in very conservative countries.