A family of Microsoft word processing software products for creating web, email, and print documents.
Hello David,
I can see why being surprised by this was very unpleasant. Please don't shoot the messenger! I am a fellow user trying to help you use the Office that is rather than the one that should be. If you assign a rating to my response, please rate my response, rather than what Microsoft is doing to all of us! The place to give feedback to them is through the feedback mechanism under File or UserVoice.
The people who can make changes to Word seldom, if ever, read anything that is posted in this help forum.
You can use the Feedback mechanism in Office or post directly to UserVoice to let developers know what you want.
https://word.uservoice.com/forums/304924-word-for-windows-desktop-application
However, I doubt they will change this. You can navigate using the TOC and can edit that without deleting the document content. I suspect most users like the ability to rearrange document parts using the navigation pane. There is always undo while the document is still open.