Have you tried changing the default app for .docx files? It just does not work. Right click on a .docx file in Finder. Hold down the Option key and you'll see "Open With" change to "Always Open With". Select LibreOffice or whatever you want. OK, that file now opens with LireOffice. But no other. WTF?
This is no "simple setting" and is the same BS that MS does.
This is no "simple setting" and is the same BS that MS does.