and nosocomial infections are rare in an all human environment.
Uh, not so sure about that. Most hospitals are an all-human environment, but that's precisely where nosocomial infections originate (it's what the term actually means). And they aren't really rare, depending I guess on your definition of rare. The estimate is that about 10% of hospital patients develop nosocomial infections, and it kills about 90,000 people every year.
Zoonotic infections are probably one of a zoo's concerns, but definitely not a top priority in terms of the focus of their medical focus. The majority of on-site medical facilities and on-site treatments at zoos are of non-human animals, namely the animals at the zoo. That's why, for example in this case, the equipment they have is suited for animals as opposed to humans.
Not sure what the argument is in those points in your quote, though...? How does it relate to your claim about him being more likely to get an infection at a human hospital than a vet clinic, even if it had been true that humans don't usually get hospital infections from all-human hospitals and if zoos focused on zoonosis?
Anyway, the actual stats being what they are for hospital infections and for zoo/vet clinics, I do agree though that he's more likely to get an infection at a hospital than a vet -- the odds are higher for an infection at a human hospital than at the zoo, all things being equal. BUT, he'd already BEEN at the human hospital, first of all. Second, we don't know his exact condition so if his problem was due to respiratory infection for example then he might have faced a secondary exposure risk at the zoo clinic (remember he already was at a human hospital, so that part of the risk equation was visited, although of course a longer stay will increase the time of potential exposure).
I raise the possibility of fear of exposure at the vet clinic just as another point to consider, since there was already exposure to risk at the human hospital. Odds might be that he wouldn't contract anything at the zoo, but it's definitely not a certainty that he wouldn't.
Pride costs people all of the time -- costs us relationships, jobs, health, and life. People frequently fear going to a hospital when they are initially ill, only to discover that the delay caused the situation to get much worse. Most breast cancer in women is treatable and in fact theoretically should have the highest survival-rate of cancer in women. But instead it is the most deadly -- precisely because women don't do self-exams enough, don't get exams at the doctor enough, and don't take immediate action when they do suspect/discover something might be wrong. Should we just say they deserve no respect or sympathy because "it's their own fault, to hell with them"?
Rational or not, shame and embarrassment are strong motivators. This guy already likely faced a lot of ridicule and embarrassment in life -- especially if he was ever around people like the majority of people posting in this thread. It's tragic that his sense of shame led him to delay getting treatment that might have saved his life (although obviously we don't know if going to that zoo clinic would've actually kept him alive or not). I don't see that as a reason to disrespect, mock, and take some twisted sort of pleasure in the man's death, though.