Not everything, just enough that this is bad advice without serious qualification.
Possibly a very high fever or some sort of dehydrating bowel disease?
I guess you could call applying pressure to and binding a wound OTC, and you could possibly die if you simply choose not to do that?
I feel like this covers that problem, no? Surely the kill-you-in-three-days problems must be very painful? And if they aren’t very painful, I wouldn’t be going to the ER anyways, so I’d die before my scheduled visit — surely at least a week out in most places I’ve visited
My hypothesis for COVID, that I don’t have good data for, was that it has an unusual immune system reaction profile with the long fuse being an under reaction followed by an overreaction and this overreaction could result in particularly damaging spiking high fevers. As someone with a preexisting auto immune condition the overreaction in particular worried me. I was worried that the use of fever suppressants early on in that process might exasperate the effect. I planned ahead of time to ride out the fever and was doing research into changes in mortality rates for Covid based on fever suppressants and I couldn’t find good data and was surprised by the lack of research to what seemed to me to be an obvious and extremely important question. Not having a good answer, especially for the Covid specific case, I decided to risk it.
When I did get Covid, post vaccine, it was a very rapid onset with a spiking fever of 106f (41c) which I knew was dangerous but again by the time that happened I couldn’t seek help. Thankfully that only lasted for about an hour and by the end of the day the Covid was basically gone.
I think in general I will try to ride out flus without fever suppressants and my N of 1 experiment seems to suggest that works. But agains selection criteria bias on that one. I really wish proper research gets done on this but I guess there isn’t much money in it.