Sia's experiencing backlash over her upcoming film and isn't handling it well at all

Hey, did you know that Sia has a new album coming out in February? The pop singer-songwriter announced her eighth studio album, Music – Songs From And Inspired By The Motion Picture, on February 12, 2021. “Uh, what motion picture,” you ask? Well, that’s where it gets just a little more complicated (or way more fucked up, depending on where you stand).
In conjunction with the album, Sia plans to release a film titled, obviously, Music. Starring Kate Hudson and Dance Moms alum Maddie Ziegler, the film will serve as the singer’s directorial debut and is set for a limited IMAX release. The official synopsis doesn’t offer much information on the plot, but says that the story “is a wholly original exploration of the healing power of love and the importance of community.” Sia’s camp released a trailer for the movie, which shows Ziegler portraying an autistic teenager. The trailer faced swift, rightful criticism from the disabled community, which was quick to point out that Ziegler—one of Sia’s long-time creative collaborators—is not autistic, making her characterization offensive to those who are.
While many would see this as a great opportunity to listen to disabled advocates (many of whom have been discussing the issue with this kind of casting rather publicly for years), Sia chose to double down rather dickishly firmly on her choice to cast Ziegler and proceeded to list all of the other representation points she managed to score in the process. “I cast thirteen neuroatypical people, three trans folk, and not as fucking prostitutes or drug addicts but s as doctors, nurses and singers,” she tweeted. “Fucking sad nobody’s even seen the dang movie. My heart has always been in the right place.”
Sia continued to respond to a number of people and tweet indignantly, mainly to lament that her good intentions and “years of research” are being overlooked in favor of calling out blatant ableism. Seriously, won’t somebody think of the poor, defensive director?