Apparently, the communications goal from the White House team was to create a strawman argument around the decision to withdraw from Afghanistan, and totally avoid the main point of crisis right now being the method and manner of the withdrawal.
However, he went one step further which makes it worse.
Joe Biden blamed the Afghan people, currently being hunted in the streets of Kabul by the Taliban, for not availing themselves of earlier opportunities for evacuation at the time when Joe Biden and his Secretary of State were telling them the country was in no imminent threat of collapse.
…”I know that there are concerns about why we did not begin evacuating Afghans — civilians sooner. Part of the answer is some of the Afghans did not want to leave earlier — still hopeful for their country. “… [Full Transcript]
The entire speech delivered by Biden was a classic example of a non-sequitur argument. Biden kept defending his decision to exit Afghanistan (which few disagree with) while avoiding the massive crisis created by his unplanned and haphazard manner/method of exit. A point that was not missed by former President Trump:

Biden took no questions, ran away from the podium and immediately hopped back on the helicopter to escape back to his bunker in Camp David.
Joe Biden is an embarrassing joke, installed on our nation.
If you know how the game is rigged, it’s actually easy to predict the background. Today, exactly on cue, several media outlets are now reporting that Joe Biden is going to increase the amount of food stamp assistance by 25% per recipient, and expand the program.
As a result of a larger awakening; which must be maintained with 
Mr. Yuri Bezmenov was a Soviet informant and KGB operative who defected to the United States in the early 70s. Within the interview [