Maybe I'm starting to wrap my tinfoil hat too tightly, but could it be that Biden and his administration think that by leaving all those Americans to die, it'll keep the truth from coming out? Right now, Biden can still attempt to deny the fate he left them to, because we're barely getting any news from on the ground.
Being told your government fucked up is one thing. Listening to a woman give interviews about her escape from Kabul after her own country abandoned her to die? That's going to stick with people. Firsthand accounts from on the ground would be awful for the establishment. Lots of eyeballs for news channels and articles, but not so good for those in power right now.
And, based on what we've seen, Biden and his ghouls are dumb enough to think this would work.