It also does away with some of the really awkward practices news organizations engage in wrt social media. The number of @JournalistNameCBC handles out there is kind of super cringy, and seems to point to journos having company-specific/company-mandated social media accounts, but without any actual company support for them.
Something like this makes having a company-mandated social media account something they're assigned, just like an email address, rather than something they're personally responsible for.