I think the question you're asking me here is "which does the most harm?"
Microsoft Office costs people money and tries to hook them into a monthly subscription. It leads them to save files in file formats that don't work properly in other Office suites and prevents them from using alternatives to Windows. They might also save their documents to OneDrive, which might be snooped to display ads to you and there's an outside chance a government intelligence agency might snoop in your documents.
Google Docs has the cloud file storage problem too. But it costs people nothing to use, their files can be opened in other office suites and they can use whatever operating system they like.
So I guess my controversial thinking is: LibreOffice is the best option, but failing that Google Docs is better than Microsoft Office.
