I believe Feynman understood that he was oversimplifying, and I believe he was able to do because his reason for reading the paper was not the same as the reason another sociologist might have. Thus a sentence like, "The individual member of the social community often receives his information via visual, symbolic channels", does, to a non-expert, mean "people read", but to another sociologist of a researcher in related fields, phrases like "individual member", "social community", and "visual, symbolic channels" would
terms of art. That means an expert in the field could read "social community" and it would mean, cognitively, an entire set of concepts in the field.
In short, jargon matters. People here can talk about functional, procedural, and object-oriented programming because each of the three words has more than just the dictionary meaning - to those of use in the field. In the same way we can talk about linear algebra and know it doesn't mean "algebra on lines".
Yes, it's possible to write scientifically without jargon and wordiness, but it's a lot of effort and takes much more space to say "a group who follow a social structure within a society (culture, norms, values, status). They may work together to organise social life within a particular place, or they may be bound by a sense of belonging sustained across time and space"[1]
1 https://othersociologist.com/2013/11/20/sociology-of-communi...