Apple does not state that Pages is totally compatible with MS Word, and from practical experience, many that have posted to this community have learned a very poignant lesson when sharing exported Word documents with their publisher, or other MS Office users, including college professors.
I work in an academic office space where there are 200 Mac laptops. By corporate directive, not a single machine has Apple Pages installed. All are Office for Mac 2011, because Word documents need to be 100% native .doc/.docx when sharing with other MS Office users in the University system. Pages cannot generate 100% compatible .doc/x documents because it is not the native Pages document architecture, and Pages is not a Word clone. If you read a Word document into Pages, it is internally converted to .pages architecture — sometimes silently dropping Word features.
Pages is great for 99% of the students that want to gamble with the accuracy of their submitted document content, and don’t care about the consequential grade result. I have two Pages versions on my home computer. Any professional directed content that I originate is done with Office for Mac 2011, or LibreOffice.