Hopefully there is more going on than the article says (hoping this article like any other isn't good at the scientific details). DSM criteria for autism - requires 3 specific social characteristics and then a bunch of repetitive/restrictive characteristics:
https://www.cdc.gov/ncbddd/autism/hcp-dsm.htmlOf course that doesn't stop people from misusing (whether "You're not autistic" to "You must be autistic").