Idiots are rarely useful in any meaningful sense. Their only real value emerges in the attention economy, where spectacle matters more than substance. In that context, they become tools for the media, drawing eyes, generating clicks, and driving engagement. That is the role he is playing here, and he has clearly captured your attention, which in turn makes him useful to the media. By drawing you in, he has enabled you to draw others in as well. His actions generate profit for the media, which is the only reason he is considered useful at all. Remove that dynamic, and what remains is simply an idiot.
