Doc as a web-content format

I love Microsoft Office as much as anyone, but there are limits to its capabilities. Occasionally I end up with an instructor (usually one that isn't very PC friendly) who decides that Doc is the best possible format to share content with students. I personally can't stand Word when I have a browser open (exception being research). I do feel that instructors are limited in what they can select, but it seems a bit bloated to use Doc. PDF is much better for web-based course instruction in my opinion. PDFs display in browsers more gracefully than a Doc ever has. Why would a C# instructor select such a clunky format to give class notes in?