First, please understand that you are not communicating with Microsoft here. These are peer-to-peer support fora hosted by Microsoft but not monitored by Microsoft employees. Some of the responders are paid agents [MSFT] but many are experienced, knowledgeable users who volunteer their time to assist others.
As recommended throughout the thread, use Help> Feedback in the program menu to submit your comments to the development group.
You also can visit the Feedback Portal for Word & cast as many votes as it will allow for each posting on the topic.
I completely agree with your sentiment, but if it eases your mind at all there are no indications in a document of Copilot having been used. Just as a suggestion, though, have you considered using PDFs rather than editable Word documents?