Re: More travelogue than science
The scene of an event is always worth seeing, even if it's an anonymous looking building, the human mind can observe and correctly infer a lot of background information from the site event.
Not that most of us need any of that extra information. For most news stories, the headline alone can tall us everything that we actually need, and in most cases even that will make zero difference to our life and we could live on unaffected if we didn't know that a nominal celebrity is upset that someone faked a naked picture of them.
In the end, I think the cost of a film crew and presenter in South America, or Asia etc fits well within the overall budget allowed for documentary making, the greater costs by far being in post production and actual airtime.