I have been trying to get "my readership" to understand that the Cortana process is related to a lot more than just (or even) the personal digital assistant function.
It is part and parcel of Windows Search. I have never even once had the personal digital assistant feature of Cortana active on any of my systems. The first thing I did back in 2015 was to "scale it back" to the behavior of plain old Windows Search.
To this day, that has not changed, through all the feature updates, but I have always had a Cortana process because I do want Windows Search to function on those rare occasions where I need to search based upon file content. Most of my searching is on file name and is done with the Everything Search by voidtools.com