It was better than propaganda. Archie was a moral and principled man when push came to shove and Rob Reiner’s liberal character was often quite flawed.
That's how it came across to 90% of the population, but the directors were too tonedeaf to realize it.
Meathead spouted the same thing liberals still spout. Thats what makes meathead the sterotype of liberals. Same playbook as the 1970s...