Your premise forgets that the Muni and all other public transit is not funded directly by its citizenry or riders. It's funded thru a mix of fare income, city and state taxes, federal appropriations. This is obviously different from something that is "locally owned and operated" since it is owned, operated, and funded by an organ of the city and/or state government.

Meshnet type stuff is comparable (in terms of the economic system it might "ideally" thrive within) to leftist ones like anarchism. (Any connotations a reader might be applying, like black masks or throwing shit, are simply connotations - I'm not advocating for anything political, either - I'm referring mostly to the anarchist concept of "just building things you want without asking anyone"). But you are missing the point if you are asking "do you really want your internet run by the same people who run the Muni?" without acknowledging the fact that publicly-owned transit authorities in the US are 'extra-ordinary' structures within the free-market capitalism they inhabit, and are therefore limited by it. In other words, there's no reason one couldn't have a great Muni, but you're pretending Muni exists in a vacuum when it doesn't.