The only relevant story I have to this topic is the time I "risked it" despite feeling funny in the morning. By mid day I was miserable and went to my boss to tell him I was going home early. He told me that to leave early I had to go see the nurse and get approval. I felt awful and going to see this nurse ended up adding 45 minutes to my departure time.
I never went into work at that employer feeling iffy again. There were a couple times that I felt fine at 10am but I had already called out so their loss. For whatever reason they didn't give us laptops either so working from home wasn't an option.
I'm really hopeful that the pandemic has broken the "crawl into work" badge of honor that seems to be part of American culture. Getting 1/2 the office sick just to prove your toughness isn't impressing anyone.
You sound way too close to the American in the story of the Mexican fisherman.
https://bemorewithless.com/the-story-of-the-mexican-fisherman/
Want to know what doesn't make a profit? A closed restaurant.
The funniest example of this I can think of is Cedar Point. They were having hiring issues in May and had to limit park hours because of it. Know what they did? Upped the pay to $20/hour. Suddenly it wasn't hard to find people to work.