There is a useful way to categorize standards. There are de facto standards and there are de jure standards.
Word documents are a standard to such a extent that by using anything else, no matter how open, you are ruining your interoperability in ways that can really harm you. And its not colleagues that are the problem here.
So while everybody here understands the value of open standards and the like, there are other standards that sometimes we need to have the ability to deal with.