I disagree with you on the basis that I can get in my car right now and be confident that I'll be able to drive with speed and safety to any city on the map, and that when I get there I'll be able to drink the tap water and to plug my electronics into any wall socket without them getting fried. Maybe some local municipalities aren't that great at keeping up with their last-mile pothole maintenance, and maybe that should be an issue the locals prioritize more when choosing their representatives - but that doesn't represent the average experience.
But also, we're already talking about publicly funded infrastructure. We've subsidized broadband to every home multiple times by now, and we still continue to write those checks. Maybe if we want it to be private we should actually enforce that and then see how it goes.