Because social media is just that: media. They're platforms for ads and marketing that are more akin to broadcast media with a parasocial interactive twist. Contrast that with social networking which facilitates connections between actual people.
At some point in the last two decades, those distinctions have blurred, often to great shareholder benefit.
"Daunting?" Nah. They'll have fun playing pretend while they use their non-existent authority to try to bully others to let them further enrich themselves.Their success won't be measured in efficiency, but in lulz.