Why do people keep saying this was inevitable or that the takeover was planned? Biden literally said in the July 8th press conference that he's confident Afghan

Why do people keep saying this was inevitable or that the takeover was planned? Biden literally said in the July 8th press conference that he's confident Afghanistan will remain under control of the Ghani government and that their military is fully capable of managing the Taliban. This was not the expected result. No one would feel good planning to return a nation to the control of a terrorist organization that has a long past history and very recent history of human rights abuses. This was a surprise to the Biden administration. They admitted it (https://apnews.com/article/joe-biden-afghanistan-taliban-5934ef05b0094d0189b5d900d2380179 https://apnews.com/article/joe-biden-afghanistan-taliban-593...). Biden literally said there would be no airlifts off embassy roofs like in Saigon (https://www.newsweek.com/clip-biden-saying-people-wont-lifted-off-embassy-roof-afghanistan-resurfaces-just-that-happens-1619517 https://www.newsweek.com/clip-biden-saying-people-wont-lifte...). But we were forced to do that and we still haven't evacuated all the Americans. None of this was planned or expected - it's just a complete failure of leadership.