This is a fascinating angle, I just looked at a couple of pubmed articles as a result of your comment and this one stuck out right away
https://pubmed.ncbi.nlm.nih.gov/38829253/
“Long-COVID is characterized by persistent symptoms following COVID-19 infection, with cognitive impairment being a prominent feature. Symptoms include brain fog, difficulties with concentration, memory issues, and executive function deficits.”
At the end of the day hardly anything has just one cause, and you may be correct that long COVID has had a big impact on the critical thinking problem in America.
Great comment, receiving contributions like this is why I posted the question in the first place, thank you
Thanks for being the first person in this thread to actually post some useful tips to get the lead out, so to speak.