Earlier quoted context omitted.
I take it you haven't been following what's going on with "Long Covid". But even among people who aren't hospitalized, there's lasting harm: https://www.medpagetoday.com/infectiousdisease/covid19/91270 I know somebody who's had this. Despite never being hospitalized, after getting sick they had to take a long medical leave from work in hopes of getting their strength back. That's worlds away from "sick for a few days…
I have been "fatigued" for 3+ years due to having children. Life goes on.
It isn't like that with disease.
The worse I've had is the complete inability to stand long enough to make a simple dinner, for example, and this was after napping and sitting most of the day. I'm lucky: Mine passed. Some people live with this day after day after day, and this is more similar to what folks with disease-related fatigue.