Have ao3 authors only ever gotten deathly sick?

This might sound crazy at first, but just hear me out real quick on my confusion.

I like reading sick fics, seeing other characters taking care of the one who's sick and all that great balance of Hurt/Comfort. So I began to notice a trend when it comes to specifically fever in fanfics.

For some reason, every single time any character has a fever, they're delirious, can't tell night from day, don't know where and when they are and can barely register the people around them or their own age, not to mention the amnesia.

I'm someone who gets sick a decent amount of times, so that confuses me. Unless you have a really really bad fever (like threatening your life type of fever) and for a bit of a long time, and yet every fever destroys the person's brain in fics.

I am so confused