Ah, this is also abstract but the abstraction is that of an idealized template
They were abstract in that they presented an idealized veneer of society : America-as-it-should-be. The pleasant smiles that are mediocre, the whimsical situations such as “boy at doctor’s office”. America-as-it-ought-to-be – a false image of America that Republicans have talked about since the 1950s that never existed.
Examples of this in TV are “Leave it to Beaver” and such. It is the same kind of veneer.
The people were caricatures, faces that were considered standards of the time, likely based on real people but representing a certain ethnicity of white in America that was considered “average” at the time.
For realistic, there’s a late 20th century / early 21st century (still current) movement called “Classical Realism”. I think that might be suitable.