I'm usually a fan of Paul Campos, but this discussion between him and Robert Farley feel way wide of the mark. Their argument is that 9/11 really didn't have a cultural impact on par with the Kennedy Assassination. The assassination certainly did exert of vise grip on the imaginations of Boomers, to the point where Trump routinely flatulates some nonsense about releasing the files. Certainly, the Kennedy assassination birthed many conspiracy theories.
However, the argument that 9/11 had a greater political and policy impact on the US is undeniable. Kennedy's death did not lead to Vietnam - sorry, Oliver Stone, that's bullshit. What it did do was unleash America's longest war and perhaps its most pointless defeat. I'm willing to argue that Vietnam was the price for winning the Cold War. It was a terrible mistake, but it was a mistake borne of a policy - containment - that won the conflict. Iraq was just completely bullshit from the start. So, if we are analyzing the cultural impact of 9/11, we have to look at the two wars (three if you want to include the GWOT) that arose from it.
Yes, the Vietnam War spawned a ton of films, but so did the cycle of wars after 9/11. What's more, a lot of tangential media like the Jason Bourne movies seem directly related to the period of fear and anxiety that came after the attacks. If anything, I think Farley and Campos are simply confusing the media that they consumed as young people with the media landscape today.
What I also think that they get wrong is not seeing how 9/11 in many ways led to Trump. There's the obvious xenophobia, sure. There's the obvious Islamophobia, sure. However, Trump's primary message was one of American decline or American Carnage. In his telling, 9/11 happened because America was "weak" (in fact, it happened because America was strong). The "forever wars" were bad not because we shouldn't have fought them, but because we weren't ruthless enough. America was a feeble nation that lost to Iraqi and Afghan insurgents.
That message was married not only to 9/11 and it's impact, but also the 2008 financial crisis, but I don't think Trump win in 2016 without tapping into the sense that America was a declining nation. Clinton represented the status quo and he was the wrecking ball.
That latter part was true, I guess.