Social media is relied on by a lot of people for official notifications. When I was in high school, my only use for Twitter was checking if my school was closed or not on snow days. I'm sure there are lots of valid reasons for schools, hospitals, emergency services, garbage collection, official media networks etc. to have social media accounts, and for regular people to follow them.

I've always thought it would be a good idea for governments to run their own mastodon servers for this, but something else with accounts (not publicly) tied to real identities could be interesting.