My point is that context is everything. For example, if you already know that most of your audience is already highly skeptical of right-wing views and talking points, then: 1) it might just behoove the program to feature the more extremist interviewees, and 2) it might actually be a waste of time, energy and resources to rebut what the audience likely already considers obvious rubbish. That's over-generalising of course, but still...
Also, NPR doesn't necessarily represent the totality of pure, journalistic purpose, and they're not there to live up to any specific outside standards. It's fine for you to critique them, but to my mind, if they're accomplishing their mission then that's the most important thing.
As someone who grew up in Philly, I'm slightly bemused as to why as a group we don't seem to have ever tried adding scrambled egg in our cheesesteaks. Or scrapple, for that matter.