The average Argentine doesn't get their news from Tucker Carlson or likely even know who he is. American expats in Argentina have any number of Argentine or international news sources and are likely more open to receiving their news from non-US sources compared to the average American.As for the interview with Milei, what matters is not how much 'credibility' Carlson has, rather how much credibility Milei has. I watched the interview to see what Milei had to say. Carlson just asked the questions. Why dwell on Carson rather than debate Milei's POSITIONS?
Carlson matters in this in that for many Americans his take will be the only take they have of Milei. If so, it's reasonable to believe that if they do get other takes on Milei it will be from those similar to Carlson.
So what? Who cares what a bunch of Americans think about Milei or Argentine politics in general? I think it's important for US citizens to have a credible picture of Milei as opposed to picture painted by a non-credible source. It matters if Carlson and his backers can make Argentina and Milei seem important enough to American voters who will be voting for elected officials who will be deciding on where and how to distribute US foreign aid. The right wing in America has made Putin/Russia, Zelenskyy/Ukraine a domestic issue and are actively trying to eliminate aid being sent to Ukraine while supporting Putin and being open to Russian propaganda spread on social media whose purpose is to weaken US democracy and democracies in general. Someone like Tucker Carlson with his desire to push his agenda at the expense of facts can impact US foreign policy which has an outsized influence on the rest of the world. The right makes clear it's desire to eliminate NATO and support authoritarian regimes throughout the world. I'm not a fan of authoritarianism or fascists and would rather not see the US try to exert any influence in this part of the world that encourages authoritarians and potential dictators like they did in Chile, Guatemala, and other countries in the region. That would be easier to do with public support and people like Tucker Carlson actively contribute to those efforts.
That said, I'm not a fan of the US exerting any kind of outsized influence in this part of the world and have no problem with the idea of a lessened US impact throughout the world. I'm just very anti-fascist/anti-authoritarian.