Joe Biden is a politician, nothing more. He had made a political calculation that we had to get out of Afghanistan, no matter what the costs may be.
Biden did not have much choice.. The ultimate deal was done by Trump and took years to put together. It was meant to end in December 2020 but Cheney and co. managed to delay it until now.
I suppose a functioning president could have reversed it but there is huge public support for ending this conflict and bringing the troops home.
Also I doubt Biden could have sold it to the left like Obama did for 8 years.
Trump boxed them in. Check mate!
Biden could have "withdrawn in force" and the Taliban would have been quiet.
Instead were treated to 24 hour news of disaster after disaster, crowds rampaging, and dead people everywhere.
Now, thanks to Selected Biden failure to simply plan we are in a mess. Biden owns this.
Thanks to Biden the US military is fleeing Afghanistan past ginormous piles of its mysteriously unused weapons and equipment while screaming like a girl with its whitey-tighties wedged up over its head.