Cassowaries are “the world’s most dangerous bird”. Technically true, but that number is astronomically low compared to cattle, for example. I thought we learned our lesson about labeling animals as killers with sharks, but ok.
You said it. There have only been two recorded human fatalities caused by cassowary attacks: one involved a 16-year old who was attacking a cassowary (not to mention, he was with a dog), and the other involved a private Florida owner. A 1999 study (cited in a likely deleted 2007
Tetzoo article which was republished as a 2016
Scientific American article) that examined 221 recorded Southern Cassowary attacks in Australia found that the majority of them involve food. Indeed, cassowaries are naturally very wary of humans; interactions generally come in the form of food-related situations, pet encounters, and cassowaries getting run over by cars. Long story short, there’s really no reason to put them on any shortlist of deadliest animals; while they are the deadliest bird in the world, that “astronomically low” number of fatalities does says more about how harmless birds are in general. There are dozens upon dozens of animals more dangerous than cassowaries. It’s a different story for dogs, though; cassowaries are notorious cynophobes and are quite willing to kick back at any dog that gets too close. Of course, close to the only predators of cassowaries are dingos and stray or feral dogs, so I don’t blame them; they have good reason to dislike canines.
This doesn’t really have anything to do with cassowary attacks on humans, but this page from the February 1997 issue of
Highlights may be relevant to the topic of cassowary stereotypes.

Well, this is right about one thing; it’s usually not advisable to keep
Casuarius casuarius in mixed-species enclosures, and definitely not with a juvenile
Elephas maximus! But don’t blame the cassowary; blame that grandpa who decided to put these animals together in a veranda.
Also, note that the elephant calf was probably not in a very good situation in the first place; hopefully he went to a good zoo. And, the Southern Cassowary is not native to Singapore.
In addition, it seems kind of unfair that the elephant is referred to as “he” but the cassowary is “it”.
Lastly, I’m sure many people would disagree with the comment about the cassowary not being a beautiful bird. Myself included, and also the two gentlemen here: