Yes it is a silly show. But at the same time it challenged a lot of stereotypes in a very positive and constructive way. It was a show that modern reviewers will consider offensive and stereotypical, but that was the whole point. Carter county did a wonderful job of showing that people can learn to get along and can still have value even if we disagree.
There are of course '70s situations that are very stupid, things that the producers were required to do, but through all of it, there is a built-in belief that people are good at heart and with dialogue and exposure, everyone can grow. I would compare the show in many ways to a pg version of blazing saddles, in the sense that it tried to reveal the idiocy of stereotypes.