It's strange, as someone who primarily consumed/consumes American media, I almost never see the "adversarial" interviews you discuss. I know they're commonplace on the BBC, but reporting in the States is largely a matter of someone having a guest on the air to push whatever they're pushing with little if any token resistance to anything.

I wish my media was more adversarial, especially in politics since so many politicians go on TV and spout complete nonsense with no challenge whatsoever by the people who really ought to know it's nonsense.