That pretty much sums it up, and there's really no way to argue that main point of the article. The Taliban basically bought their time for 2 decades and know the country better than any one else, including the ANA and the US, the former's lack of will or reason to fight notwithstanding.The two decades of combat, the one trillion dollars spent, the 100,000 troops deployed to subdue Afghanistan, the high-tech gadgets, artificial intelligence, cyberwarfare, Reaper drones armed with Hellfire missiles and GBU-30 bombs and the Glbobal Hawk drones with high-resolution cameras, Special Operations Command composed of elite rangers, SEALs and air commandos, black sites, torture, electronic surveillance, satellites, attack aircraft, mercenary armies, infusions of millions of dollars to buy off and bribe the local elites and train an Afghan army of 350,000 that has never exhibited the will to fight, failed to defeat a guerrilla army of 60,000 that funded itself through opium production and extortion in one of the poorest countries on earth.
Even though Trump signed the bill that would withdraw the US from Afghanistan, Biden will have to shoulder this epic failure of losing the entire description above to the Taliban in just 8 days. Mostly because of his comments on Kabul having no eminent danger of falling to the Taliban so quickly just a few days ago. Making a bold comment like that and then watching it slap him in the face is a political disaster and a major failure on his part and his advisors.
That's the other part which discredits the idea that there was some pact between the US and the Taliban that what has happened is some coordinated, backdoor handover. Had that been the case, he would never have made such a horrible and miscalculated claim like he did. The possibility of it being a major intelligence failure is very plausible, considering its record in the last 2 decades plus. But even so, he can't throw the US' intelligence under the bus and let them shoulder the blame as that would create a major distrust between the intel community and the administration.
Waiting to see if Biden makes some statement or announcement. He's going to have to face the music at some point.