>Many of the most mundane decisions made in municipal councils go completely unnoticed yet they can destroy whole communities in the long run.
They go unnoticed because of scaling issues, not because people are per se less interested in local politics than national politics. If you write a story about a decision on the local city council, it is of interest to maybe a few hundred thousand, whereas a story about Congress is of interest to tens of millions. Even if people were ten times as interested in local news (as measured by their willingness to subscribe or the amount of ads they are willing to be exposed to), it would still make more sense to send a reporter to the Capitol before City Hall.