"she said in an interview that fantasy and sexual and/or romantic writing were incompatible"

has she, like

read any adult fantasy novels

like, literally ANY

because at least half of the ones I've read have had sex scenes, sometimes a LOT of sex scenes

this sounds more like a her problem tbh

Although I will grant that she was writing books that she knew kids were reading, so I can see where she would want to keep it toned down for her younger readers