Political opinion and analysis outside the mainstream rarely are found on television talk shows, and it might be thought that this state of affairs is a product of the political agenda of the television stations themselves.
Curious Fact
Why do you rarely see any political opinion or analysis outside the mainstream on TV talk shows?
Rejected Explanation
The TV stations have a mainstream political agenda (so they don't allow radical viewpoints to have airtime.
Author's Explanation
It's the TV stations' economic agenda, not a political one. They're trying to capture the largest possible share of the TV audience, so they will only air shows they think will appeal to large numbers of people. That's why the TV talk shows only feature opinions and analyses that are bland and innocuous.
Evaluation
Whenever an author is trying to Explain a Curious Fact, we want to consider two questions: - could there be an Alternate Explanation? - how plausible is the Author's Explanation?
However, most question stems ask what is assumed by the argument. This one asks what is assumed by the author's explanation. So it seems like we don't need to worry about alternate explanations for this question.
What is the Author's Explanation assuming?
She thinks they don't show fringe opinions outside the mainstream because they only air shows that will appeal to large numbers of people. The implication? Shows with non-mainstream opinions won't appeal to large numbers of people (and shows with mainstream opinions will).
There's also a slight language shift from saying if bland and innocuous, then rarely outside the mainstream".
Goal
Look for something that seems to match the author's story that TV stations only want to air shows that appeal to large numbers of people, they don't think non-mainstream opinions will usually appeal to large numbers of people, so instead they put on bland and innocuous opinions that should be mainstream and appeal to large numbers.