I am not an art guy but I have read a lot of ARTFORUM. The problem the FA articulates is that in respect of surrealism, Kahlo knew what she was doing and where she was going, but because Mexico was perceived as a "province" or colony and Kahlo was not a dude, they basically treated her as if she were a 5-year-old who had naively stumbled on a craft of making surrealist-like kitsch pictures (per the article, I myself don't know what people were doing with Kahlo in that time frame). No potential for innovation or influence over the "true vanguard" of Art, just a sideshow. Doing something on her own in a way, but a dead end.