Sociologist: The intended function of news is to give us information on which to act.
Conclusion (therefore)
In a consumer society, news is primarily entertaining and cannot serve its intended function.
Evidence
The intended function of news is to give us information on which to act.
In a consumer society, news becomes a product to be manufactured and dispensed to the consumer.
An enormous industry for the production and consumption of news has evolved.
We ingest news with an insatiable appetite.
Evaluate
This argument is following a comparative reasoning pattern, where it's contrasting what news is supposed to do (its intended function) with what it actually ends up doing (becoming primarily entertaining).
The sociologist is assuming there's a necessary conflict between news being entertaining and news providing actionable information. Essentially, the argument contends that if news is primarily entertaining, it fails to deliver the information needed for us to act.
We can try to defend the conclusion by considering if there are any cases where entertainment and actionable information coexist. Alternatively, the argument could be assuming that the qualities of "primarily entertaining" and "providing actionable information" are mutually exclusive or difficult to combine.
Goal
Let's find an answer that connects being "primarily entertaining" to being unable to provide the information on which we can act. Alternatively, the answer might need to defend against the idea that these two qualities could coexist effectively.