He says that as if it's not extremely common these days for preliminary, unconfirmed information to spread like wildfire, among everyone. The half-life of news in the public consciousness has grown so short that it's common for public attention to event X to have basically already dwindled to nothing, by the time all of the confirmation/debunking has happened.
Hell, I still encounter people, once in a while, who think Kyle Rittenhouse targeted and shot black people, all these years later, which was one of the very first things claimed about the Kenosha shooting after it happened, and was officially debunked almost immediately.