This won't be forgotten. Not due to some misplaced optimism, but because the situation meets every single criterion to be exactly the kind of thing the general populace sits up and takes notice of. This kind of situation is what cratered Carter, lead to even Reagen dipping below 50% for a couple of years, and is practically textbook.
My memory is bad, so i can't remember if it was your, or another poster where we were discussing how the Afghan incident will be out of the papers within a week. I still stand-by it (if it wasn't you, my bad)
Everything you've said is correct, but ignores one important (imo) piece of information; The Internet. No President has had internet impact, or used the internet to their own advantage prior to Trump. No doubt Bush and Obama published things on the internet, or made Facebook videos, but they never used the full weight and power of SM to push their agendas (at least not as obviously as Trump and now Biden).
Almost every person in the west is connected to the internet, now from a shockingly young age. The internet, or the MSM and SM propaganda arms, use psychological manipulation to achieve greater impact with their stories. Hell, 99% of headlines with a figure in them are taken at face value, without a second-thought or question as to what those numbers mean in real life, where they came from, how they were collected etc. Think of 'click-bait' headlines. They MAKE YOU click them, because of how they are phrased and worded.
To the point. The MSM and SM can push a narrative, force the story, twist the words and lie to the normies (who are called normies because they are the average person and the majority of 'normal' people).
The 70k number will be swallowed hook, line and sinker. NPC's will use it every chance they get to make it a normalised number, then fence sitters and those undecided on what to think, will parrot what the NPC's are saying, as they don't want to look like idiots "believing in right-wing conspiracies"
Look at covid. Vaccination is now a normalised word, despite being factually incorrect, admitted to by the very people who are calling it a vaccination. It isn't a jab, or an inoculation, but vaccination. Why? Because anybody who doesn't agree with it must be anti-vax - you know, those idiots who 99% of the population agree are idiots, there's nothing wrong with vaccinations. But vaccination is used as a way to bludgeon those who refuse the jab, with the embarrassing label of anti-vaxxer. Another example, though less effective due to subject matter, is "If you don't go to celebrate Pride events, you don't like gays. What are you, a homophobe?"
Sorry for the sperg, but i have ZERO faith in the average American going against Biden, when his whole campaign is "at least i'm not Trump". However, the Trump-card (pun intended) will be well worn out and useless this time next year and by then, the MSM haven't completely solidified Biden as unquestionably great, then there will be the question of "Do NPC's still like this guy", right now, it's too early and Bidens only 'noticeable' fuck up.