Egyptians don't like the notion that "they moved there from somewhere". They claim their own unique, uninterrupted, history and connection to the land as well as their civilizational independence from Mesopotamian, Asia Minor, Europe, and Africa.
It's also the same you rarely find Egyptian archeologists/scholars on scientific papers. While this might be a matter of ancient history and science to everyone, it's a matter of current day politics for Egyptians and especially the Egyptian government. The "findings" of the paper has to agree with the narrative built and proposed by the ministry of antiquities or they will literally charge whoever publishes it with a national crime.