I remember that article, it is just an an example of an overzealous bureaucrat to manage/control their charges (students..)
The trouble is that the bureaucrat is essentially correct in their opinion: windows is exactly everywhere
--you only have to watch political/tv/news or dramas on TV to see the windows flag logo draped across all computers being shown, either in a windows based screensaver or as a product placement with a stick-on at the back of a monitor.
- And bureaucrats or indeed most people are not known for being open-minded, in fact the natural position is to be closed minded and value one's own opinion more than any data that should present itself..
Trying to force or somehow persuade someone to change their mind and look at other than MS OSs' and applications is almost a losing battle: like being stuck in quicksand and being slowly pulled under..
The only thing most; maybe all decision makers for these product placements recognize is
that there is safety in numbers and just to go along with the standards in place whether it really makes sense (costs more in support or training) or not
--you don't get fired for agreeing with your boss.