Study sheds new light on Tutankhamun’s mysterious dagger ‘born’ from meteorite

But I don't really see anything that would salvage the situation to the point where it made some kind of sense. You'd need to imagine a political situation balanced so finely that Tushratta's uncle could hold on to the throne after killing his own brother, but killing his nephew would have been a step too far. And then he had years -- during which he had successfully isolated Tushratta from the rest of his family! -- to let some kind of accident happen to him, but it didn't.

> Meteorite falls may have been the source of cultish worship. The cult in the Temple of Artemis at Ephesus, one of the Seven Wonders of the Ancient World, possibly originated with the observation and recovery of a meteorite that was understood by contemporaries to have fallen to the earth from Jupiter, the principal Roman deity.[68] There are reports that a sacred stone was enshrined at the temple that may have been a meteorite.

However, that doesn't mean that the particular knife of Tutankhamun was necessarily known by the Egyptians to have been made from meteoric iron.

> The origin is another mystery around Tutankhamen’s blade. In the Amarna Letters, a diplomatic correspondence written on clay tablets and discovered in a royal archive in the south of Egypt, there is a list of gifts sent by King Tushratta of Mitanni in Anatolia, to Pharaoh Amenhotep III, Tutankhamun’s grandfather of Ancient Egypt when he married Princess Tadukhipa, the daughter of Tushratta. Among the gifts mentioned in the list is a dagger with an iron-made blade.

> The research of Arai’s team states that this is very likely to be the same dagger for two main reasons. The first being that iron-processing technology was already common practice at the time in the Mitanni regions. And second, because the dagger’s gold hilt shows a low percentage of calcium with no sulfur. This feature indicates the use of lime plaster as an adhesive material for the decoration of this part of the object, a frequently used material in Mitanni, which was used in Egypt until several centuries later, during the Ptolemaic period.

(I assume they meant 'which was [not] used in Egypt until several centuries later', otherwise that sentence doesn't quite make sense)

Humans originally used meteoric metal became they lacked the ability to mine and smelt the ore themselves. When humanity gained the technological ability to reliably and economically refine iron ore themselves, meteoric metal was discarded (rightfully) as inferior and more trouble than it was worth.