As someone who has read quite a few coffin texts... wut? This is 100% an unnecessarily provocative article that tries to turn a minor misunderstanding (the concept of exactly what the mummification process was meant to preserve) into a big thing, and probably mainly to get publicity for their exhibition.

Egyptian embalming wasn't embalming in the modern sense (it wasn't intended to be a lifelike embalming*), but the part of the soul that went to the afterlife required the body (khet) to be preserved to do so. Through preservation of the body (not just by natron, but sanctified bandages and all sorts of treatments, although in any but the "perfect rite" the organs weren't preserved), the rememberance of their name and the appropriate rites the deads vital essence and personality were reunited in death to form their "living intellect".

*The process was probably inspired by, and had much more incommon with, the natural desert mummification process.