All the other answers are great, but I think they're missing the biggest and most important reason: a social network run by any government entity would only run on Internet Explorer 6 or Firefox 2, would store your password in plain text, and would run on 15-year-old un-patched IIS on a few Windows XP servers stored in the basement of city hall. And it would probably all be built on top of a deprecated social media W…
Please stop perpetuating this lie. You can, and should expect better of your public digital systems. Don't let them use "Public tech must be bad" as an argument.