This is an uninteresting argument. COVID happened, and suddenly way more people than before reported these kinds of symptoms. You can make this argument in any

This is an uninteresting argument. COVID happened, and suddenly way more people than before reported these kinds of symptoms. You can make this argument in any individual case, sure, but on the macro level, your argument becomes that either somehow lots of people got chronic fatigue syndrome (and similar) all at the same time, or lots of people are suddenly faking it all at the same time, or long COVID is real. I mean yes, mass hysteria does exist, culturally-bound mental disorders also exist, but the most obvious explanation of these facts is that yes, long COVID is a thing.